Answer:The Sun
Explanation:The Sun is the major source of energy for organisms and the ecosystems of which they are a part. Producers, such as plants and algae, use energy from sunlight to make food energy by combining carbon dioxide and water to form organic matter. This process begins the flow of energy through almost all food webs.
Answer:
The Sun is the major source of energy for organisms and the ecosystems of which they are apart. Producers, such as plants and algae, use energy from sunlight to make food energy by combining carbon dioxide and water to form organic matter. This process begins the flow of energy through almost all food webs
Explanation:
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Which of the following components of the electron transport chain passes electrons to O2 and causing it to be reduced to H20?
A. Cytochrome c oxidase
B. Succinate -Q reductase
C. NADH
D. NADH-Q oxidoreductase
Answer:
The correct answer is option A, that is, cytochrome c oxidase.
Explanation:
A sequence of complexes, which conduct electrons from electron donors to electron acceptors through redox reactions, that is, both oxidation and reduction reactions taking place simultaneously is termed as the electron transport chain. This conduction of electrons is further combined with the mediation of protons across a membrane.
Four membrane-bound complexes are present within the mitochondria, of these in complex IV or cytochrome c oxidase, the withdrawal of 4 electrons takes place from 4 molecules of cytochrome c, and is mediated towards the molecular oxygen, which further gives rise to 2 molecules of water. During the process, 8 H+ are withdrawn from the mitochondrial matrix, which contributes to the proton gradient.
What happens to energy as it flows through an ecosystem?
Answer:
The chemical energy storied as nutrients in the bodies and wastes of organisms flows through ecosystems from one trophic level to the next and through this flow energy also is lost as heat. And the chemical energy avaliable to the succeeding feeding level decreases.
Answer: The chemical energy stored as nutrients in the bodies and wastes of organisms flows through ecosystems from one trophic level to the next and through this flow energy also is lost as heat. And the chemical energy available to the succeeding feeding level decreases.
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Which of the following is not a component of the hepatic triad found at the edges of a liver lobule?
a) hepatic artery.
b) bile duct.
c) central vein.
d) hepatic portal vein.
Answer: c) central vein.
Explanation:
The liver is an organ that is present both in humans and in vertebrate animals. It secretes the bile, essential for the digestion of fats, and it also has many other functions, including the synthesis of plasma proteins, storage of vitamins and glycogen and detoxifying function. It is responsible for removing various substances from the blood that may be harmful to the body, including alcohol, making them harmless.
The liver is divided by the sickle cell ligament into two main lobes, right and left. There are two other smaller lobes, the square lobe and the caudate lobe.
The hepatic triads are triangular areas located at the angles of the hepatic lobules, made up of a lax conjunctive stroma. They contain a branch of the hepatic artery (that irrigates the liver), a hepatic portail vein (a thick blood vessel that carries blood from the gastrointestinal tract and spleen to the liver so that nutrients are metabolized) and a bile duct (transports bile into the small intestine). Therefore, it does not contain a central vein.
If Brittany is investigating how fast Brian will react to three different sounds, the independent variable in the experiment is the time it takes brian to react
Answer:
This question is incomplete; the complete part is asking whether the statement about the independent variable is; True/False
The correct answer is False
Explanation:
In an experiment, the independent variable is the variable that the experimenter controls or manipulates in order to effect a change or bring about a response. The variable that responds to this manipulation is the dependent variable.
In this experiment involving Brittany, who is investigating how fast Brian will react to three different sounds, the independent variable is the DIFFERENT SOUNDS because that's the variable that Brittany changes in order to effect a response I.e. how fast Brian will react. Hence, the time it takes brian to react is rather the dependent variable.
If a sperm cell contains 8 chromosomes, it comes from an animal that has ______ chromosomes.
A. 4
B. 8
C. 12
D. 16
E. 24
If a sperm cell consist of 8 chromosomes, it comes from an animal that has 16 chromosomes. So, the correct option is (D).
What are Chromosomes?Chromosomes are defined as thread-like structures made of proteins and a single molecule of DNA that carry genomic information from cell to cell. In plants and animals, including humans, chromosomes reside in the nucleus of cells.
Each chromosome is made up of a single protein and a single deoxyribonucleic acid (DNA) molecule that is passed from parent to offspring, and contains specific instructions that make each type of living organism unique.
While sperm has eight chromosomes, the animal it comes from has 16 because the gametes received half the chromosomes from the parent cell.
Thus, if a sperm cell consist of 8 chromosomes, it comes from an animal that has 16 chromosomes. So, the correct option is (D).
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which statement best describes the limit of science
Why is it necessary to take an interdisciplinary approach to studying biology?
Answer:
Interdisciplinary approach involves using methods and knowledge associated with other subjects or topics in a different one. Some subjects are known to be interrelated and employ the use of a common understanding or knowledge.
Biology is a subject in biological science that involves the study of living and non living things and their interactions with the environment. These interactions involves the use of some knowledge/methods in Chemistry, Physics etc such as how Friction which is prevalent in Physics with how organisms move.
allows neurons to speed up the transmission of nerve impulses.
Answer:
The Myelin Sheath allows neurons to speed up the transmission of nerve impulses.
What air pollution control devices reduce carbon monoxide and nitrogen oxide emissions from automobiles?
Answer:
Reduce the number of trips you take in your car. Reduce or eliminate fireplace and wood stove use. Avoid burning leaves, trash, and other materials. Avoid using gas-powered lawn and garden equipment.
Explanation:
I think this,,
The catalytic converter is a device that reduces carbon monoxide and nitrogen oxide emissions from automobiles.
What do you mean by Air pollution?Air pollution may be defined as the harmful organic and inorganic substances or particles present in the air.
The catalytic converter is a device that is placed in the vehicle's exhaust pipe for converting Carbon monoxide, nitrogen oxide, methane, and other harmful gases into less toxic gases.
Therefore, the catalytic converter is a device that reduces carbon monoxide and nitrogen oxide emissions from automobiles.
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What part of the bacterial cell is most involved in gram staining and why?
Answer:
Cell wall
Explanation:
The cell wall is the part of the bacterial cell is most involved in gram staining. This is because the two types of gram bacteria which are known as the gram positive and gram negative bacteria have different and unique cell wall constituents.
The gram positive bacteria have a cell wall composed of peptidoglycan while the gram negative bacteria have cell wall composed of a thin layer of peptidoglycan and an outer layer of lipopolysaccharide. They give different results when stained ; gram positive bacteria retains the crystal violet color of the reagent used while the gram negative bacteria gives a pale reddish color.
The bacterial cell is most involved in gram staining is cell wall because it decides the color strength in the bacteria.
Gram Staining:
It is method of classifying bacteria on the basis of thickness of the cell wall of bacteria. This method includes 4 steps.
Color all bacteria with crystal violet.Use iodine as stabilizer of crystal violet.Decolonization by the ethyl alcohol.Final color is added as saffronin.All Bacterial cells take up the crystal violet in the first step. On decolonization, gram negative bacteria lose the violet color because of thin peptidoglycan layer.
Therefore, the bacterial cell is most involved in gram staining is cell wall because it decides the color strength in the bacteria.
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An ecologist is studying Dunaliella Salina a single celled algae in a local pond. The con is located near construction site in the Ecologist wants to know what effect if any the construction site is having on the pond as there has been a steady decline in the dunealiella Salina population. In order to complete their study the ecologist would like to examine the organelles inside dunaliella Salina. If they would like to examine the inner structure of the chloroplasts of an already dead dunaliella Salina, What microscope would best suit edfor this task?
Answer:
The electron microscope
Explanation:
The microscope that would be best suited to study the inner structure of the chloroplast would be the electron microscope.
The electron microscope has a high magnifying property due to the fact that it uses a beam of accelerated electrons as a source of illumination, unlike the light microscope that uses visible light. While the light microscope might be enough to see the inner portion and the organelles of the cell, the tiny nature of the inner structure of the chloroplast means that the light microscope will not be able to view the details. A more powerful microscope like the electron microscope would be required.
What is conversed in a physical change
Answer:The same amount of matter exists before and after the change—none is created or destroyed. This concept is called the Law of Conservation of Mass. In a physical change, a substance's physical properties may change, but its chemical makeup does not.
Explanation:
Which of these classification categories contains the most closely related group of organisms?
A) domain
B) genus
C) family
D) phylum
E) kingdom
The organisms are classified into different categories based on the taxonomic level. The genus contains the most closely related organisms and groups. Thus, option B is correct.
What are taxonomic ranks?Taxonomic ranks are the grouping of the biological organisms based on the similarity shared by them and were proposed by Carl Woese. It has seven main ranks based on shared aspects.
The kingdom is the first rank that includes the broadest classification, including plants, animals, protists, monera, and fungi. The kingdom is followed by division, then class, followed by order, family, genus, and lastly species.
The genus is the rank from the list that will have the closely related organisms as the categorization of the shared characteristics increases down the ranks of the taxonomic classification.
Therefore, the genus has closely related organisms.
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If DNA were to be discovered today, what might have been different?
Answer:
everything is the same, but more slowly
Explanation:
Reception of a signal released by the same cell is which of the following types of signaling?a. juxtacrine.b. autocrine.c. paracrine.d. exocrine.e. endocrine.
Answer:
The correct answer is b.
Explanation:
In the endocrine system, the signaling molecule or hormone is produced by a gland and discharged into the blood where it travels until it reaches certain cells distant from its place of origin on which it acts. In autocrine communication, the signal produced by a cell regulates the cell that produced it, that is, it is when the cells send messages to themselves. In autocrine signaling, a cell releases a hormone that acts on the same cell. This occurs between cells that are relatively close together and the existence of a specialized structure is not necessary, being a local communication.
what microorganisms have been used to make marmite? what microorganisms have been used to make bun? what microorganisms have been used to make cheese? what microorganisms have been used to make beer? what microorganisms have been used to make vinegar? what microorganisms have been used to make malt vinegar?
Explanation:
It is produced industrially by fermentation using yeast or bacteria. Marmite's defining ingredient is made from brewer's yeast heated to create glutamic acid, which is used by farmers to increase plant growth and boost crop yields.
Which compound forms when carbon dioxide diffuses and reacts with seawater?
A. Carbonic acid
B. Hydroxide ions
C. Carbonate
D. Bicarbonate
Explanation:
the answer is carbonic acid .
Answer:
water and carbon dioxide
Are you more likely to observe evolution between T0and T1in the Source population or betweenT0and F1in the Founder population? Explain your reasoning
Answer:
You are more likely to see evolution between T0 and F1 in the Founder population.
Explanation:
The founder's population is one that is formed by a few individuals or even a single individual. It occurs when the original population has experienced a sharp decrease in membership because of a natural disaster or migration. However, when observing the evolutionary process of the founder's population, we can observe that the allelic frequencies of this population are very different from the allelic frequencies of the original population, due to the different evolutionary processes that they went through. This allows you to see the evolution between T0 and F1 in the population of the Founder more efficiently than between T0 and T1 in the population of origin.
Which domains contain organisms that lack a membrane-bound nucleus?a. Archaea & Bacteria b. Archaea & Eukaryac. Bacteria & Eukaryad. Eukarya & Animaliae. Archaea & Animalia
Answer:
Archaea and Bacteria lack a membrane-bound nucleus.
Explanation:
Archaea, bacteria lack a membrane-bound nucleus. Meaning, they are both prokaryotes. Eukaryotes and Animalia are the opposite. They have membrane-bound nuclei.
The nucleus is not membrane-bound in either the domain archaea or the domain bacteria, hence option A is correct.
What are prokaryotes?Single-celled creatures known as prokaryotes are found in the Bacteria and Archaea domains. Prokaryotic cells lack organelles, have no nucleus, and are significantly smaller than eukaryotic cells.
Archaeal cells, like other living things, have an exterior cell membrane that acts as a defense against the environment of the cell.
The cytoplasm, which is part of the membrane and contains the archeon's DNA, is where its life processes are carried out.
They contain a plasma membrane, ribosomes, and cytoplasm, in contrast, bacteria do not have cell membranes.
Therefore, the prokaryotic category of organisms includes bacteria, which are unicellular, hence option A is correct.
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Need help fast!!! Please Answer as soon as you can!
Answer:
i think the last option might be correct
In the light-independent reactions of photosynthesis, CO2 is added to a five-carbon molecule known as
5._____________________is factual information that results from a scientific investigation. A.bias B.data C.assumption D.none of the above
Answer:
It is B, data.
Explanation:
Data is what you collect from an experiment.
OPTION B) DATA IS FACTUAL INFORMATION THAT RESULTS A SCIENTIFIC INVESTIGATION.....
I'M SURE IN MY EXAM IT'S COMES......
HOPE IT HELP......
alcohol_ both the central and peripheral nervous systems
Alcohol affects both the central and peripheral nervous systems.
_____________Explanation:
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Affects.Why chloroplast called energy converting molecule?
Answer:
They use oxygen in the process of releasing chemical energy from sugars.
Explanation:
Chloroplasts work to convert light energy of the Sun into sugars that can be used by cells. The entire process is called photosynthesis and it all depends on the little green chlorophyll molecules in each chloroplast.
They change either glucose energy of sunlight energy into something the cell can use.
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The following example illustrates applications for which anomalies are of considerable interest. Click all that apply: a. Fraud Detection b. Intrusion Detection c. Medicine d. Ecosystem Disturbances
Answer:
Fraud Detection
Intrusion Detection
Medicine
Ecosystem Disturbances
Explanation:
Anomalies are items or actions that do not conform to expected pattern. They are also referred to as outliers on data sets that do not exhibit the characteristics of the population under consideration.
Anomalies can be caused by natural variation, data errors, data from different classes.
Examples of anomalies are:
Fraud Detection
Intrusion Detection
Medicine such as influenza outbreaks
Ecosystem Disturbances such as flood and drought
3. After meiosis, resulting daughter cells will contain
(select only one answer)
the same number of chromosomes as the parent cell
half the number of chromosomes than the parent cell carries
twice the number of chromosomes than the parent cell carrie
three times the number of chromosomes than the parent cell carries
four times the number of chromosomes than the parent cell carries
nodolse Isu
Answer:
The correct answer would be : half the number of chromosomes than the parent cell carries.
Explanation:
Meiosis is a type of cell division takes place in reproductive cell to produce the haploid gametes to fused during fertilization. In meiosis a single cell give rise to four daughter cells with half number of genetic material or chromosome to original amount of the parent cell, which gives it name reduction division.
As the gametes form by this type of cell division fused during fertilization, it is necessary to have haploid number of chromosome to maintain the number of chromosome in diploid cell or somatic cells.
Thus, the correct answer would be : half the number of chromosomes than the parent cell carries.
The extracellular fluid compartment includes what fluids? a. Interstitial fluid b. Blood plasma c. Cerebrai spinal fluid d. Pieural and pericardial fuidd. Cytoplasm
Answer:
The correct answer is:
a. Interstitial fluid
b. Blood plasma
Explanation:
The total volume of water corresponds to 60% of body weight. This volume is divided into two large compartments, the intracellular and the extracellular. The extracellular compartment is subdivided into blood plasma and interstitial fluid, with an approximate volume ratio of 1: 3. Blood plasma is the non-cellular part of the blood and continually exchanges substances with the interstitial fluid through pores of the capillary membranes that are permeable to almost all the solutes in the extracellular fluid except for proteins. The ionic composition of plasma and interstitial fluid is similar thanks to capillary membranes, which maintain the balance between hydrostatic and colloidosmotic forces.
Why can overfishing lead to ecosystem collapse? Will O A. Many mammals rely on fish for food. B. Eventually, it will lead to exponential growth. O C. Fish help maintain the temperature of the ocean. O D. The predators that rely on fish will increase in population.
n e w 8/28/2020
Answer:
many mammals rely on fish for food
Explanation:
Mary Beth bought 15 ghost shrimp. She put 5 in a small fish bowl, 5 in a larger tank, and 5 in an artificial pond in her backyard. What are the two controlled variables (CONSTANTS) Mary Beth should have to be able to tell whether the size of the tank affects the size of the shrimp after 6 months? growth of ghost shrimp and size of tank Initial age of ghost shrimp and water temperature Initial age of ghost shrimp and size of tank growth of ghost shrimp and water tempera
Answer:
Initial age of ghost shrimp and water temperature
Explanation:
In an experiment, there are several variables (alterable factors) that determine the outcome of the experiment. A CONTROLLED variable or CONSTANT is a variable that is kept constant or unchanged throughout the experiment. The constant is not changed because it can affect the other variables (outcome) of the experiment.
For this experiment conducted by Mary Beth on the effect of size of the tank on the size of the shrimp after 6months, the constants are INITIAL AGE OF GHOST SHRIMP and WATER TEMPERATURE. This is so because the ghost shrimps of the same initial age must be used to start the experiment, so as to be able to measure the actual effect on the growth. Also, the water in the respective tanks must be the same Temperature so that one experimental group will not be favored over another.
Allison is growing a few beds of sunflowers and giving each group different amounts of water for a period of five weeks to see if it affects their growth. All of the groups receive the same amount and type of soil, and receive the same amount of sunlight. She gives the first sunflower group 300 extra milliliters of water a day. The second receives 200 extra millilitres of water a day and the third bed of sunflowers receives no extra water and obtains water only natural ways. Allison records the heights of the sunflowers after each week. what is the: •IV: •DV: •Constants: •Control:
Answer:
Sandra is growing mums in her backyard and wants to determine how much water she should give the plants to produce the most flowers. Plant A receives only rainwater and is given no additional water. Plant B receives rainwater and an additional cup of water per day. Plant C receives rainwater and an additional two cups of water per day. All mums are given the same amount of sunlight and fertilizer. a. Control Group