Chorionic villus sampling and amniocentesis show increased risks in older women because it increases the risks of suffering mutations (a) and this procedure may increase the risk of spontaneous abortion (b).
What are chorionic villus sampling and amniocentesis?Chorionic villus sampling (or abbreviated as CVS) and amniocentesis are medical procedures used to determine the risk of genetic disorders in a developing embryo, which is associated with the presence of mutations and therefore they have increased risks in older women who are more prone to have mutations.
It is important to highlight that these procedures (Chorionic villus sampling and amniocentesis) may increase the risk of abortion.
Therefore, with this data, we can see that chorionic villus sampling and amniocentesis are diagnostic procedures used to determine the presence of genetic disorders in the developing embryos and they can affect the rate of spontaneous abortion.
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what kind of protist is this? group of answer choices ciliate plasmodial slime mold flagellate foram
The kind of this protist is plasmodial slime mold.
Thus, the correct option is B.
What is protist?Protists аre simple eukаryotic orgаnisms thаt аre neither plаnts nor аnimаls or fungi. Protists аre unicellulаr in nаture but cаn аlso be found аs а colony of cells. Most protists live in wаter, dаmp terrestriаl environments or even аs pаrаsites.
Kingdom Protista is classified into the following:
ProtozoaSlime mouldsChrysophytes, Dinoflagellates and EuglenoidsWhat is plasmodial slime mold?Plasmodial slime molds (myxomycetes) are а group of fungus-like orgаnisms usuаlly present аnd sometimes аbundаnt in terrestriаl ecosystems. The myxomycete life cycle involves two very different trophic (feeding) stаges, one consisting of the uninucleаte аmoebаe, with or without flаgellа, аnd the other consisting of а distinctive multinucleаte structure, the plаsmodium.
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Scientists predict that we will eventually use up all available fossil fuels. Which list includes only fossil fuels?.
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when atp is abundant, which processes are likely to occur? choose one or more: gluconeogenesis glycolysis glycogen synthesis glycogen breakdown mobilization of fats
The process which happens when ATP is abundant is the process of gluconeogenesis and glycogen synthesis.
Gluconeogenesis is the process of synthesis of glucose from non carbohydrate sources, the most important raw materials being pyruvic acid or oxaloacetate and dihydroxyacetone phosphate. When the intake of carbs from food is insufficient for the needs of the body, the body will turn glucose into energy to meet the needs of the body.
Glycogen synthesis: is the process of glycogen formation from sugar. When there is an increase in blood sugar, the insulin hormone will facilitate the glucose in the blood to store in the liver and muscle cells as energy reserve.
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a eukaryotic cell has just started replicating its dna. what is a true statement about the cell? select all that apply. group of answer choices the cell is in the g2 stage of the cell cycle. near each origin of replication there are two replication forks. telomerase may be used to make sure that the lagging strand at the end of the chromosome is complete. ligase is being used to remove rna primers.
When eukaryotic cell has started replicating its DNA, then following are true: a)near each of the origin of replication there are two replication forks b)telomerase is used to make sure that the lagging strand in the end of chromosome is complete.
What happens when DNA starts replicating?Two replication forks are formed at the origin of the replication and they get extended in both directions as replication proceeds.
There are multiple origins of replication on the eukaryotic chromosome so that replication can occur simultaneously from other places in the genome.
Telomerase is large ribonucleoprotein complex responsible for progressive synthesis of telomeric DNA repeats at the 3′ ends of linear chromosomes, hence reversing the loss of DNA from each round of replication.
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Mark all of the terms that are related to the structure of DNA.
a
ribonucleic acid
b
guanine
c
double helix
d
hydrogen bonds
e
thymine
f
single helix
g
adenine
h
deoxyribonucleic acid
i
cytosine
j
uracil
PLSSS HELP IF YOU TURLY KNOW THISS
Answer:
c) Plants
Explanation:
We can conclude that plant is the producer from the given picture. Therefore, the option (c) is the correct answer.
Answer:
c: plants
Explanation:
producers are any green plants and they are capable of creating of their own food
Hopes this helps please mark brainliest
in the absence of oxygen, the process of occurs to regenerate nad so that atp production in can continue.
Only glycolysis can convert glucose into ATP in the absence of oxygen. But since glycolysis produces NADH, it must be converted back into it in order to carry on metabolizing glucose.
What takes place during glycolysis?The method by which glucose is metabolized to release energy is known as glycolysis. It generates ATP, NADH, water, and two pyruvate molecules. It doesn't require oxygen to take place because it happens in the cytoplasm of a cell. In both anaerobic and aerobic organisms, it happens.
What are the principal purposes of glycolysis?Sugar molecules are broken down during glycolysis to release energy needed for cellular metabolism. The cell's cytoplasm is where it takes place. The primary goal of glycolysis is to create countless ATP molecules, which are then used for different types of cellular metabolism.
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you have a problem with ants in your garden. initially, you use an over the counter insecticide to kill them off. the next time, however, the insecticide does not work as effectively. what process best explains this result?
Type the correct answer in the box. Spell all words correctly.
Henry went on a field trip to a national park. He not only observed the aquatic life in the
land. Which type of diversity did Henry come across in the national park?
pond, but also the trees, vegetation, and animal's species on
Henry came across the
diversity.
i need help with biology
Answer: A, carboxyl group
Explanation:
What molecule in cells provides the immediate energy needed for biochemical reactions?.
Molecule in cells provides the immediate energy needed for biochemical reactions is ATP (Adenosine Triphosphate).
Understanding ATPATP is soluble in water because it has phosphatehydride bonds. The phosphatehydride bond of ATP is very unstable, easy to break but easy to reconnect.
This is why ATP can immediately release large amounts of energy when it is needed very quickly. This allows us to move the body quickly without any pause between the mind moving and the movement itself.
ATP formationATP is formed from the glycolysis process that takes place in the mitochondria. Mitochondria are cell organelles that have an internal membrane where glycolysis takes place.
Glycolysis is the reaction of breaking down glucose from food into pyruvic acid and ATP. The pyruvic acid is further broken down to produce ATP and tricarboxylic acid.
ATP is produced according to the amount of food that enters the body, and can be used up when used to move. When you exercise, the amount of ATP used by the body is more than when you only play with your cellphone.
This is why we feel tired after exercise, because the ATP in the body must be replenished with food.
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Which of the following most accurately represents the relationship between externalities and agricultural economics?
externalities, like ecological services, are considered to be “free” and of no economic concern to the grower
externalities are a net positive to communities due to the extra employment that results from the need to remediate them
there is increasing pressure on growers to reduce their production costs by using methods that increase externalities
there is increasing pressure to include the cost of externalities in evaluations of the economy of agriculture
Answer:
D. There is increasing pressure to include the cost of externalities in evaluations of the economy of agriculture
Explanation:
You want to know an accurate representation of the relationship between externalities and agricultural economics.
ExternalitiesExternalities are costs or benefits that accrue to third parties not involved in the production or use of products of agriculture. They include impacts on natural resources, wildlife and ecosystem biodiversity, and human health, among others. A 2004 study estimated the costs in these areas in the US to be between $29 and $96 per hectare of cropland.
These costs are borne by society at large, and are rarely charged back to farmers or agricultural supply companies.
AwarenessAs public awareness increases regarding these costs, pressure tends to be put on growers and livestock suppliers, and their suppliers, to reduce the adverse effects of their operations. That is ...
... there is increasing pressure to include the cost of externalities in evaluations of the economy of agriculture
stress activates two systems. one is the: group of answer choices hpa axis, which becomes increasingly important with prolonged stressors hpa axis, which reacts more quickly than the autonomic nervous system autonomic nervous system which secretes the hormone acth autonomic nervous system which secretes the hormone cortisol
Regarding the nervous system, stress will cause the sympathetic nervous system to become active, which in turn causes the adrenal glands to become active. After the acute stress-induced crisis has passed, the parasympathetic nervous system aids in the body's recuperation.
What is autonomic nervous system ?the area of the neurological system in charge of hormone production and glandular and muscle movements in internal organs (including the heart, blood vessels, lungs, stomach, and intestines) (such as salivary glands and sweat glands).
Circulation and heart systems: The autonomic nervous system regulates blood vessel size and the rate and force with which your heart beats. Your autonomic system uses those skills to assist regulate your blood pressure and heart rate.
The paraventricular nucleus in the hypothalamus is the primary brain region responsible for the autonomic nervous system's central regulation.
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2. Before DNA replication can occur, the double-stranded DNA must first-
A be transcribed into RNA
B be translated into amino acids
C replace deoxyribose with ribose sugars
D separate between the nitrogen base
Before DNA replication can occur, the double-stranded DNA must first be transcribed into RNA.
The first two processes of DNA replication are initiated sequentially. A so initiation protein first releases a little section of the DNA quadruple helix. The two DNA strands are then pulled apart by helicase, a protein that binds to and dismantles the hydrogen bonds holding the bases on the DNA strands together.
The stretch of the double helix that is about to be duplicated must first be unwound already when replication could take place. Additionally, the weaker hydrogen bonds between the coupled bases must be broken in order to distinguish the two strands, much like the opposite wings of a zipper.
Therefore, the correct answer will be option (A).
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An antimicrobial disk on a kirby-bauer plate that shows no zone of inhibition indicates that the microbe being tested is __________ to the drug.
Answer: Resistance
Explanation:
The antimicrobial disk had no effect on the growth of the microbe indicating that the microbe is resistant to that specific antimicrobial.
Explore the biotic and abiotic factors of this system in the Factors menu, including the definitions of how
these factors are measured. Describe the difference between how the fishes are counted and how the
algae and coral are counted.
In ecology, biotic and abiotic elements refer to all living and nonliving components of an ecosystem. Biotic variables are related to living creatures and their interactions. Abiotic variables are non-living ecosystem components such as sunshine, water, temperature, wind, and nutrients.
The fish are estimated within a certain area while the coral and algae are calculated by seeing how many algae and coral cover the reef.
What are the benefits of Abiotic Factors to the Factors Menu?Abiotic variables are non-living elements of the environment that have a significant impact on living organisms. They can assist in determining how tall trees grow, where animals and plants live, and why birds migrate. Water, sunshine, oxygen, soil, and temperature are the most significant abiotic variables.
Abiotic variables are the ecosystem's non-living components, which include chemical and physical elements. Abiotic variables have an impact on other abiotic factors.
Furthermore, they have a significant influence on the diversity and quantity of life in an ecosystem, whether on land or in water. Living creatures would be unable to consume, develop, or reproduce without the presence of abiotic forces. The following is a list of some of the most important abiotic elements.
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which enzyme is responsible for the majority of the digestions of lipids? which enzyme is responsible for the majority of the digestions of lipids? gastric lipase lingual lipase bile pancreatic lipase
In order to enzymatically digest lipid molecules, the digestive process first breaks those huge droplets of fat into smaller droplets using lipases, an enzyme.
What specific enzymes are involved in the breakdown of lipids?Enzymes known as lipases are present in pancreatic juice (enzymes that break down lipids). Lipases have relatively limited surface area to work with when the lipid in the chyme clumps into big globules, rendering lipid digestion ineffective.
Which enzyme, according to this quizlet, digests lipids most frequently?Triglyceride digestion takes place mostly in the small intestine, where bile and pancreatic lipase work to break down the fats into forms that may be absorbed.
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The carbohydrate produced by photosynthesis can be stored as starch in the leaf. A plant with variegated leaves used up its store of starch because it was placed in the dark. Explain why the plant used up its store of starch when it was placed in the darkThe carbohydrate produced by photosynthesis can be stored as starch in the leaf. A plant with variegated leaves used up its store of starch because it was placed in the dark. Explain why the plant used up its store of starch when it was placed in the dark
what are the requirements for photosynthesis to occur? 2) why do some trees appear green during the spring and summer, but then red / orange / yellow in the fall? 3) what are two factors that cause pigments to move at different rates during paper chromatography?
The adrenal medulla is different from the remainder of the sympathetic division because __________.
The adrenal medulla is different from the remainder of the sympathetic division because neurohormones, not as neurotransmitters.
The medulla is the inner part of the adrenal gland and is concerned with the production of epinephrine and norepinephrine. The adrenal medulla is a glandular extension of the sympathetic part of the autonomic nervous system. When the sympathetic nervous system is activated in response to stress or threat, the medulla oblongata releases two substances, epinephrine, and norepinephrine, into the bloodstream. Each stimulates a target organ in the same way, but adrenaline is removed from the bloodstream more slowly and its effects last longer, increasing the metabolic rate to produce more energy.
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a change in bowel habits prompts a 53-year-old woman to see her physician. on physical examination there are no lesions noted on digital rectal examination, but her stool is positive for occult blood. a colonoscopy is performed and reveals a 6 cm friable mass inthe cecum. a biopsy of this mass is performed and microscopic examination shows a moderately differentiated adenocarcinoma. after resection of the tumor, the oncologist begins treatment with 5-fluorouracil (5-fu) combined with other chemotherapeutic agents. 5-fu not only kills tumor cells but also rapidly growing cells of the immune system and intestine. what is the mechanism by which 5-fu selectively kills fast growing cells?
The mechanism by which 5-fu selectively kills fast growing cells is K-RAS mutation in the neoplastic cells.
An abnormal mass of tissue that paperwork whilst cells grow and divide extra than they need to or do no longer die once they have to. Tumors may be benign (not most cancers) or malignant (cancer). Benign tumors may also grow big however do not spread into, or invade, close by tissues or different parts of the frame.
There are three primary styles of tumor:
1) Benign: these tumors are not cancerous. They do no longer invade close by tissue or spread to other parts of the frame. ...
2) Premalignant: In these tumors, the cells aren't but cancerous, however they could doubtlessly end up malignant.
3) Malignant: Malignant tumors are cancerous.
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a researcher is concerned about a chemical in the lake kariba ecosystem that has the potential to biomagnify, much like ddt. due to limited resources, pollutant levels can be tested in only two species. which two species are the best to compare to reveal possible biomagnification between them?
Biomagnification is the accumulation of non-essential chemicals in the oceans in the food chains as it goes upwards. zooplanktons and Eagle
It increases its concentration in the tissues of organisms as it travels up the food chain. As the toxicity increases and so the trophic levels, it also causes some organisms death. can also be defined as the trophic enrichment of contaminants within food webs.
example- when DDT is put into oceans-
DDT is accumulated in the zooplanktons, which is then consumed by small fishes and then large fishes and then by bird eating fishes ( eagle)
the concentration goes like
zooplanktons ( 0.04ppm)
small eating fishes (0.5ppm)
large eating fishes (2ppm)
eagles ( 25ppm) - this high level disturbs birds ca metabolism.
therefore, two species are the best to compare to reveal possible biomagnification between them is zooplanktons and eagle to find out the difference between them in toxic levels.
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while you and your classmate are studying for your biological anthropology midterm, your classmate tells you that the fossil of lucy, a famous australopithecine specimen that dates to about 3.2 mya, was dated based on carbon 14 analysis. why is this incorrect?
Studying the evolution, diversity, and adaptation of people and their extant and fossilized relatives is known as biological anthropology.
What is biological anthropology midterm ?By examining biology (particularly the skeleton), evolutionary theory, inheritance, the fossil record, and contemporary primates, biological anthropology looks into the biological evolution and variation of both human and nonhuman primates. It examines how behavior, ecology, and biology are related to one another.
Biologists study how people adapt to various surroundings, how biological and cultural processes influence growth, development, and behavior, and what factors contribute to illness and early mortality. They are also fascinated with the biological beginnings, evolution, and variation of humans.
What is Fossil ?Any surviving remains, impression, or evidence of a once-living thing from a previous geological epoch is referred to as a fossil. Examples include fossilized bones, shells, exoskeletons, animal or microbe imprints in stone, amber-preserved artifacts, hair, petrified wood, oil, coal, and DNA traces.
If a specimen is more than 10,000 years old, it is typically regarded as a fossil. The oldest fossils date back between 3.48 and 4.1 billion years.
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Use this model to describe unobservable relationships
I don't completely comprehend what you are asking for, but I will try my best to answer your question. First, we can notice that there are two bonds between Adenine and Thymine, while there are 3 bonds between Guanine and Cytosine. This suggests that bonded Guanine and Cytosine pairs are stronger than bonded Adenine and Thymine pairs. Additionally, we can conclude that Adenine and Cytosine are both purines, as in the model, both bases are depicted with a 6-membered ring fused to a 5-membered ring, which is what defines a purine. On the other hand, Thymine and Cytosine are both pyrimidines since, in the model, they are depicted with only one 6-membered ring, which is what defines a pyrimidine.
agarose is a polysaccharide polymer that is used for electrophoresis. polyacrylamide is a more porous or highly cross-linked gel that provides a higher resolution of smaller fragments and single-stranded molecules. what is the health concern with its powder form?
The powder form of polyacrylamide is neurotoxic in nature.
Polyacrylamide is a polymer of Acrylamide (ACR).
At room temperature, acrylamide (ACR) is a crystalline solid with the chemical formula C3H5NO and a molecular weight of 71.08. ACR is used in a variety of chemical and industrial processes in its monomeric form, which is a water-soluble powder.
Acrylamide (ACR) monomer is neurotoxic in humans and laboratory animals. This chemical's subchronic exposure results in neuropathies, numbness in the hands and feet, aberrant gait patterns, muscular weakness, ataxia, skin changes, and, in rare cases, cerebellar changes. Because of damage to the nerve terminal caused by membrane fusion processes and tubulovesicular changes, Acrylamide (ACR) neurotoxicity primarily affects the peripheral but also the central nervous system.
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homologous structures such as mammalian forelimbs and bird wings share same anatomy and ancestry but perform different functions. this is a result of
Divergent. The arrangement and structure of the bones are strikingly similar. Therefore, it makes sense to infer that they are related to one another by ancestor form.
What about homologous structures?Homologous structures are similar physical traits present in species with a common ancestor, despite the fact that these traits serve fundamentally different biological functions.Examples of homologous structures include the limbs of humans, cats, whales, and bats.The human arm, a bird or bat's wing, a dog's leg, a dolphin or whale's flipper, and a bird or a bat's wing are examples of homologous structures.Organs or skeletal components of animals and organisms that are homologous reveal a relationship to a common ancestor because of their similarities. The appearance and purpose of these structures need not be identical. Excellent examples of homologous structures include a person's arms and a bat's wings. People and bats share a common ancestor because they are both mammals. A bat wing's and a human arm's internal bone structures are remarkably similar, despite the fact that they look very different from the outside. It is an illustration of a bone or organ with similar underlying anatomical traits that can be found in other animals. These structures provide evidence for evolution and support the theory that all creatures share a common ancestor.Learn more about homologous structures here:
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which of the following is incorrect concerning carbohydrate absorption? multiple choice end products of carbohydrate digestion are transported through the portal vein to the liver. disaccharides are digested to monosaccharides by enzymes that are attached to intestinal cells. maltose is transported through the portal vein to the liver. monosaccharides can enter the villi.
In relation with carbohydrate absorption the correct statement is- maltose is transported through the portal vein to the liver.
The correct option is c.
Complex carbohydrates are first broken down into oligosaccharides by stomach and salivary enzymes, which are subsequently hydrolyzed to monosaccharides by particular disaccharidases situated at the enterocyte brush boundary.
The small intestine is where carbohydrates are chemically broken down instead of the stomach. The disaccharidases and pancreatic amylase complete the chemical cleavage of digestible carbs. The liver receives the monosaccharides once they are absorbed into the circulation.
Dietary lactose, sucrose, and maltose—all of which are sugars—diffuse in the small intestinal lumen and come into contact with the absorptive epithelial cells that line the villi. There, they interact with brush border hydrolases, which break down the sugars into two molecules of glucose by the enzyme maltase.
The complete question is:
Which of the following is incorrect concerning carbohydrate absorption? multiple choice
a. end products of carbohydrate digestion are transported through the portal vein to the liver.
b. disaccharides are digested to monosaccharides by enzymes that are attached to intestinal cells.
c. maltose is transported through the portal vein to the liver.
d. monosaccharides can enter the villi.
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a red-eyed female fly was crossed with a white-eyed male fly. all the f1 offspring have red eyes. two of these red-eyed f1 generation flies were crossed to each other. the f2 generation included both red- and white-eyed flies. remarkably, all the white-eyed flies were male. what was the explanation for this result?
The answer for why all of the white-eyed flies are males is that a gene exists on the X chromosome.
What defines a generation?A generation is the collective term for all individuals who were born and are still alive at around the same period. The average time frame, commonly regarded to be between twenty and thirty decades, in which children are born, grow up, becoming adults, and start having children is another way to put it.
Why is it called the Silent Generation?The Silent Generation supported "working within the system," in contrast to the preceding generation, who had pushed for "changing the system." They achieved this by putting in long hours of work and gaining the reputation of being "quiet."
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Why were Cynognathus fossils were important to Wegener's theory?
A They were found on lands now separated by a wide ocean
B They were the oldest fossil found at the time.
C They were found on lands joined together today.
D They were discovered in Antarctica and Africa.
What did Alfred Wegener try to prove with fossil evidence?
A that Earth is almost 5 billion years old
B that Earth is round, not flat
C that Earth once had no continents
D that Earth's landmasses move over time
Cynognathus fossils were important to Wegener's theory They were found on lands now separated by a wide ocean .
Cynognathus fossils are an important evidence for Wegener's theory as these were present over lands that are now separated by a wide ocean They also have iron particles that were present with in the Earth's magnetic field.
The important evidence that strongly supported the Theory of Continental Drift is the fossil record. Fossils record carries the evidence of similar types of plants and animals present on rocks of a similar age on the shores of different continents, suggesting that the continents were joined together.
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e large number of antibodies that can be produced in a single individual is a result of: being able to produce unique antibodies from both the maternal and paternal alleles. secreting multiple antibodies that will be presented on the surface of other b cells. making a unique antibody from all other b cells by genomic rearrangement. making multiple unique anti
The large number of antibodies that can be produced in a single individual is a result of a single B cell: (3) making a unique antibody from all other B cells by genomic rearrangement.
Antibodies are the proteinaceous structures that form an essential part of the immune system. Each antibody is Y shaped structure that consists if 2 small light chains and 2 heavy chains. They are joined together by disulfide bonds. They are produced by the B cells.
B cells are also called the b lymphocytes that are a type of white blood cells. They provide humoral adaptive immunity to the body. The B cells are developed as well as matured inside the bone marrow.
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