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They are created with the intervention of the human being and can be modified at any time
Example:
Urban ecosystems; The gardensAgricultural ecosystems; the orchardstrue or false: in multicellular organisms, genes are regulated in the same way to ensure that gene expression levels are constant regardless of cell type or developmental stage.
False, in multicellular organisms, genes are not regulated in the same way to ensure that gene expression levels are constant regardless of cell type or developmental stage.
Gene regulation is the method of controlling which genes in a cells DNA are expressed (used to make a purposeful product which include a protein).
Different cells in a multicellular organism may also explicit very specific units of genes, despite the fact that they include the identical DNA.
The set of genes expressed in a cell determines the set of proteins and purposeful RNAs it contains, giving it its specific properties.
In eukaryotes like humans, gene expression entails many steps, and gene law can arise at any of those steps. However, many genes are regulated commonly at the extent of transcription.
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What is a similarity between genes and chromosomes?
Responses
both come in pairs
both are fragments of genetic information
both contain information needed to synthesize proteins,
both are tightly wound up into condensed structures
Answer:
both come in pairs
Explanation:
because of meiosis both start off in pairs but later chromosomes separate into two unidentical daughter cells during anaphase and genes seperate to haploid cells
which one of the following is most associated with an air-pollution disaster like the one in 1948 in donora, pennsylvania? a. high winds b. temperature inversion c. increased industrial production d. shutdown of a power plant
Temperature inversion causes air pollution disasters like the one that occurred in Donora, Pennsylvania, in 1948. (option b).
Is it comfortable or frigid at 60 degrees?Is 60 degrees warm or chilly, you might be wondering. 60 degrees is typically considered to be mid-temperature. 60 degrees is roughly in the midpoint of the US's temperature range, which extends from below negative to over one hundred.
Is 65 degrees too chilly for a home?Your apartment or home might not be warm enough just to keep you safe even if you keep it between 60°F and 65°F. If you live alone, this is a particular issue because no one else will feel how cold the house is or detect if you are showing signs of hypothermia.
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which diagnostic test or procedure refers to a laboratory test in which a colony of microorganisms are grown to determine the type of organism and which antibiotic will destroy that organism?
A blood culture diagnostic test or procedure is a laboratory test that involves growing a colony of microorganisms to determine the type of organism.
A blood culture is a laboratory test that detects microorganism and other germs in a blood sample.If your blood culture test results are "positive," it usually means you have bacteria or yeast in your blood. "Negative" indicates that they are not present. The majority of bacteria can be seen in the culture after 2 to 3 days. However, some types can take 10 days or longer to appear. It can take up to 30 days for fungus to appear in the culture. A blood culture is a test that looks for germs in the blood.
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A boy and a dad get into a car accident. The dad did not make it, but the boy did. The boy went to the hospital, and the doctor said I couldn't. He is my son. Who is the doctor?
Answer:
the doctor is the mother of the boy
what are environmental resistance and carrying capacity? how do biotic potential and environmental resistance interact to determine carrying capacity?
Environmental Resistance: Each and Every environmental constraint that restricts the population's ability to grow.
Carrying capacity: The largest number of people who could comfortably rely on their available resources without depleting them to the point where future generations wouldn't have enough to survive.
They both have a say in population size because when a population grows above its biotic capacity, resource depletion threatens the survival of subsequent generations, which in turn endangers the population or species. Because of all the environmental constraints in their area of residence, environmental resistance essentially defines the biotic potential of a population.
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Have you had the chance to watch a tree grow over a span of several years? Did you notice that the tree grew thicker and taller? Deep in the roots of the tree and high in the growing shoots are meristem cells. Each year, the meristem cells help the tree continue to grow. As a tree ages, it needs to keep making more xylem and phloem cells to carry water and food.
Which statement explains how this occurs?
A. Xylem and phloem from one part of the plant are transferred to another part.
B. The existing xylem and phloem divide to make more xylem and phloem.
C. Cell division is not necessary for a plant to create new xylem and phloem cells.
D. Meristem cells divide and some of the new cells differentiate into xylem and phloem.
Answer:
I think its D
Explanation:
hope this helpsss :)
you are leading a team of researchers at a pharmaceutical company. your goal is to design drugs that help fight cancer. specifically, you want to focus on drugs that bind to and inactivate certain proteins, thereby halting cell cycle progression. one of your team members suggests targeting the retinoblastoma (rb) protein and inhibiting this protein. will this approach be successful? why or why not?
To design drugs that help fight cancer, targeting the retinoblastoma (rb) protein and inhibiting this protein will not be successful.
What will happen when you target the retinoblastoma (rb) protein ?Targeting the retinoblastoma (rb) protein and inhibiting this protein during the research for designing drugs for cancer will not be a successful approach.
Rb is a tumor-suppressor protein and it functions to inhibit the action of a number of cell cycle regulatory proteins. A drug designed to inactivate the Rb protein would create the same situation as in a cell that lacks both copies of the Rb gene.
Lack of Rb activity releases the inhibition of cell cycle regulatory proteins and thereby promoting cell cycle progression rather than halting it.
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errors during what phases of meiosis are responsible for the production of aneuploids? select all that apply.
The solution is highlighted on the image. Please check all that apply. Anaphase II, metaphase II, and prophase I.
Why do you use the term "aneuploids"?Aneuploidy is a genetic condition in which there are fewer than 46 chromosomes. You will have 47 chromosomes if there is a trisomy. You will have 45 chromosomes if you are monosomically mutated. The result of a pregnancy could change if the amount of chromosome changes.
What contributes to aneuploidy?Aneuploidy, a condition where the amount of chromosomes in a cell a organism deviates beyond multiples of the haploid genome, is caused by errors in chromosome segregation. Chromosome mis-segregation during meiosis, which results in aneuploidy, is a key contributor to infertility and inherited birth abnormalities.
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Which of these
BEST describes why
DNA never leaves
the nucleus?
A. DNA is a very large molecule plus it is a really
important molecule for life that needs
protection.
B. Most DNA serves absolutely no purpose so it
should always stay at home in the nucleus.
C. DNA just cannot compete with other
molecules such as RNA.
Answer:
A. DNA is a very large molecule plus it is a reallyimportant molecule for life that needsprotection.
Explanation:
DNA cannot leave the nucleus because that would risk it getting damaged. DNA carries the genetic code and all of the information needed for cells and organisms to function properly. If it were damaged or mutated, that would be disastrous for the organism, and could cause serious illnesses or even death.
DNA is a very large molecule plus it is a really important molecule for life that needs protection. Thus, option A is correct.
Why DNA cannot leave the nucleus?DNA will not leave the nucleus as it is because that would risk it as getting it damaged. DNA has carries the genetic code and all of the information needed for the cells and the organisms to function properly. If it has been damaged or mutated, that would bethe disastrous for the organism, and could cause the serious illnesses or even death.
mRNA could leave the nucleus, but the DNA cannot leave the nucleus because RNA has been considered as the single-stranded, and DNA has been double-stranded, so RNA has been smaller than the DNA.
DNA would be not a single-stranded structure. While RNA has been present in the single stranded form in the cell. Due to this, the double-stranded structure of the DNA seems longer than that of RNA to cross the nuclear membrane in the cell. As a result of this, RNA can easily leave the nucleus but DNA couldn't.
Therefore, DNA is a very large molecule plus it is a really important molecule for life that needs protection. Thus, option A is correct.
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when an rh-negative mother gives birth to an rh-positive infant, the mother usually produces antibodies that will attack any subsequent pregnancies in which the fetus is rh positive. when subsequent babies are rh positive, erythroblastosis fetalis occurs. what is another name for erythroblastosis fetalis?
Alloimmune HDFN (Hemolytic disease of the fetus and newborn) is another name for erythroblastosis fetalis.
What is erythroblastosis fetalis?
Hemolytic anaemia in the fetus known as erythroblastosis fetalis is brought on by the transplacental transfer of maternal antibodies to fetal red blood cells.
This condition is typically brought on by mismatch between the maternal and fetal blood groups, frequently Rho (D) antigens.
Immunoglobulin G (IgG) antibodies from the mother damage neonatal red blood cells, which is the source of the condition. Isoimmunization refers to the production of maternal antibodies in response to a fetal antigens.
Therefore, Alloimmune HDFN (Hemolytic disease of the fetus and newborn) is another name for erythroblastosis fetalis.
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During which stage of mitotic division do chromosomes align at the equator of the cell?.
Chromosomes align in the cell equator occurs at the metaphase stage.
Mitosis is the process of cell division into two daughter cells with identical DNA base pairs. Mitosis takes place in four stages namely prophase, metaphase, anaphase, and telophase.
In the second stage of mitosis, namely the metaphase stage when the nuclear membrane is gone, so the chromosomes come out of the nucleus and are aligned in the the equator cell. Chromosomes are in the densest state so that they are shorter and thicker and the chromatids repel each other, each attached to the opposite end of the fiber.
.
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species x has a gene a that has this as part of its sequence: atgctgcctagc which species is most closely related to species x, based on their gene a sequence?
ATTTGCCTAGC is most closely related to species x, based on their gene a sequence.
What is Sequence ?The basic structure of a biological macromolecule, also known as the sequence, is the covalently connected, one-dimensional ordering of monomers inside a biopolymer. The term "sequence" can apply to a variety of substances, although it is most frequently used to describe a DNA sequence.
An ordered list of numbers is a sequence. The three dots indicate that the established pattern should move forward. A phrase is used to describe each number in the series. The first term in the order 1, 3, 5, 7, 9,... is 1, the second is 3, the third is 5, and so on.
The nucleotide base sequence of an organism's genetic material can be recognized and recorded thanks to DNA sequencing. Frederick Sanger and his associates created the chain termination method of sequencing throughout the 1970s. Another name for the chain termination technique is Sanger sequencing.
What is Gene Sequence ?A technique used in laboratories to map out the complete genetic composition of a particular organism or cell type. To detect changes in specific regions of the genome, utilize this technique. These modifications could aid research into the pathogenesis of particular diseases like cancer.
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plants pollinated by the hummingbird do not receive pollen from plants pollinated by the bumble bee. this is an example of:
Plants pollinated by the hummingbird do not receive pollen from plants pollinated by the bumble bee is an example of mechanical isolation.
Physical incompatibility between the reproductive systems of two species is referred to as mechanical isolation. Prezygotic barriers like mechanical isolation prevent fertilization, which prevents reproduction. Any physical barrier that precludes mating is considered mechanical isolation.
The separation between white sage and black sage is among the most known instances of mechanical isolation in plants. The two sage species can't interbreed because they depend on distinct pollinators, although having a similar geographic area.
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connect the optimal ph of each enzyme to their location in the body. Does each optimal ph make sense for those locations? Why or why not?
Each enzyme has an ideal pH, but it also has a range of different ph within which it can continue to function. The lipase will determine this. The stomach's acidity causes the pepsin enzyme to break down proteins.
What is enzyme made of?Proteins called enzymes were made up of amino acids connected by one or more peptide chains. The fundamental structure of a polypeptide refers to this arrangement of amino acids. This in turn determines the enzyme's three-dimensional structure, including the active site's shape.
What is the function of enzyme?Enzymes, which are proteins, help speed up the metabolism of our bodies' chemical reactions. While certain chemicals are generated, others are decomposed. Everything that is alive contains enzymes. Naturally, enzymes are produced by our bodies.
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Select more than 1 answer
Plasma is responsible for all of the following EXCEPT
A. carries nutrients like glucose and oxygen
B. carries hormones
C. carries antibodies and antitoxins
D. allows the blood to flow because it is mostly water
E. allows the body to maintain body temperature
F. carries waste products like carbon dioxide
Human blood types are determined by genes that follow the codominance pattern of inheritance. there are two dominant alleles (a and b) and one recessive allele (o). if a man that has the blood type aa mates with a woman that has the blood type bo. what are the chances of them having a baby that has "a" blood type?
Answer:
50%
Explanation:
Blood type a and b are codominant, so lets express as 'A and B'
Blood type o is recessive, so is expressed as little 'o'
A man has blood type aa which needs to be written as dominant (in caps) = AA
A woman has blood type bo. The b needs to be dominant and the o stays as little 'o' = Bo
As you can see in the punnet square I have drawn the alleles of the man (AA) at the top and the alleles of the woman (Bo) on the left side to find the alleles of the offspring.
We have the alleles:
AB, AB, Ao, Ao
AB = blood type AB because A and B are codominant which are expressed equally
Ao = blood type A as only A is dominant here which takes express over the recessive 'o'
We have 2 'Ao' out of 4
2/4 = 0.5
0.5 × 100 = 50%
The ability to simultaneously recognize the color, shape, size, and speed of an oncoming automobile best illustrates.
Answer:
The ability to simultaneously recognize the color, shape, size, and speed of an oncoming automobile best illustrates: parallel processing.
Explanation:
nicotine acts in the brain by 1. enhancing gaba's inhibitory effects. 2. increasing serotonin reuptake. 3. first stimulating and then blocking cholinergic receptors. 4. reducing blood flow to the cerebral cortex.
Nicotine mainly shows its action through specific nicotinic acetylcholine receptors located in the brain. It stimulates presynaptic acetylcholine receptors thereby enhancing Ach release and metabolism.
The dopaminergic system is also stimulated by it and thus increasing the concentration of dopamine in nuclear accumbens. Nicotine induces GABA release by binding to excitatory nACh receptors located on presynaptic GABA neurons.
The serotonergic system may be involved in smoking behaviour because nicotine increases the brain's serotonin secretion, nicotine withdrawal decreases serotonin levels and a selective serotonin reuptake inhibitor antagonises the response to nicotine.
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a researcher has a dna sample that was generated from the mrna extracted from a cell line. the researcher wants to determine specifically how much of gene a was expressed in that cell line. what is one experiment that could be done to quantitively measure the expression of gene a?
To quantitatively measure the expression of gene A generated from the m-RNA extracted from a cell line, the researcher should use real-time PCR.
Cell line is defined as the the population of cells generated from a single cell that continues to divide may be indefinitely. Cell lines are formed from the primary cell cultures. Cell line are used for various purposes like vaccine production, drug testing, antibody production, etc.
Real-time PCR is the type of PCR where the amount of product accumulated in the real time as the mechanism of production of the product is being carried out. The quantification is done along with each cycle of the PCR.
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3.How are organisms grouped into producers, consumers, and decomposers?
Where do you fall
Answer:
Food webs are models to show how organisms are related in an ecosystem based on how they get their energy. The main roles are producers, consumers, and decomposers?
Explanation:
Producers
Producers make their own energy through photosynthesis. All most all plants, But not all, are Producers.
Consumers can be divided into
Primary > Primary consumers get energy by eating producers. They are usually small animals, insects and herbivores.Secondary > Secondary consumers get energy eating primary consumers. Secondary consumers are usually predators.Tertiary > Tertiary consumers get energy by eating secondary consumers. Owls and birds of prey, bears and large predator's, and carnivores are usually tertiary consumers. Humans are also among the tertiary consumers.And lastly Decomposers
Decomposers get by breaking down dead organisms and returning nutrients to the soil. Decomposers are usually fungi-like-mushrooms and bacteria
On which day is the level of LH in the bloodstream at its highest? What event occurs immediately after this peak?
Answer:
LH reaches its highest concentration on day 13. This causes the follicle to burst, releasing the ovum, and the follicle begins to develop into a corpus luteum.
The level of LH in the bloodstream at its highest at the 14th day of the menstrual cycle. Ovulation takes place ta the 14th day of the month which does ovulation.
What is the full form of LH ?The full form of LH is leutinizing hormone.
Corpus luteum is formed at the 14th day of the cycle that is the matured graffian follicle when releases an ovum then the matured graffian follicle makes the structure called as the corpus luteum which is yellowish in color.
With the increase in LH, other hormones also peak up because the hormones have to be associated with the thickening of the uterus walls and the walls of uterus have to be thickened up so as to make the uterus fit for baby production.
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What is the spinal cord structure that consists of nerves that leave the conus medullaris and lumbar enlargement and pass downward through the vertebral canal, resembling a horse tail?.
Spinal Cord is long, tube-band of tissue which is connect brain to our lower back. Spinal Cord is is a cylindrical structure which is carries nerve signal from our brain to our body and vice versa.
People mostly misunderstand Spinal Cord as Spine, but Spinal Cord is structured by band of tissues, nerves and cells.
Spinal Cord Functions are:
Control body movement, such as heartbeatNotify sense to our brain, such as when we hurtControl body reflex, such as moving your neck when someone touch it.Explanation:
Cauda Equina Syndrome also known as Cauda Equina is structure of Spinal cord which ends at the upper part of the lumbar (lower back) spine or at the first level or second level of lumbar, this condition which are like horse tail or called as Cauda Equina which means horse tail in Latin.
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erwin chargaff observed that the proportions of adenine (a) and thymine (t) bases were always equal, as were the proportion of guanine (g) and cytosine (c). how does that make sense with watson and crick's model of dna?
The observation of Erwin Chargaff make sense with that of the Watson and Crick's model as in the model of DNA, Adenine base pairs with Thymine and Guanine base pairs with Cytosine. Therefore, the numbers of adenine and thymine are equal and also of guanine and cytosine.
DNA is the most prevalent form of genetic material as it is more stable. The nucleic acid consists of deoxyribose sugar, nitrogenous bases and phosphate group. Sugar and phosphate are arranged alternatively and form the backbone. The structure of DNA is double stranded.
Thymine is one of the bases of DNA. It is different from the others because it is present only in DNA and not in RNA. It base pairs with adenine using 2 hydrogen bonds.
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motion can be described through a change in___________
A speed
B distance
C Position
D time
Answer:
speed
Explanation:
the genetic material of the human immunodeficiency virus is rna. in hiv-infected human cells, the rna can be copied into a dna molecule by a process known as
The RNA can be copied into a DNA molecule by a process known as Reverse transcription.
Reverse transcription is DNA dependent RNA polymerase, and it is considered the imitated enzyme of retroviruses. reverse transcriptase function to utilize only the single-stranded RNA to synthesize viral DNA.
As the name suggest it reverses the flow of genetic information from RNA to DNA in place of DNA to RNA that is most common case in transcription. As reverse transcriptase is important process in some retroviruses, like HIV-1. As this process requires to counter many antiretroviral therapeutics drugs .
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you are examining the rapidly dividing cells of a fish embryo and notice a cell that seems to contain two nuclei with complete nuclear envelopes and decondensing chromosomes. the middle of the cell is pinched inward. this cell must be in
This cell is in Telophase stage .
Telophase is a end stage of mitosis where two new nuclear envelopes form in each daughter cell.
Mitosis is a fundamental process for life. In mitosis cell duplicates all of its contents, also the chromosomes . Telophase is the final phase of cell division, between anaphase and interphase . Process that separates the duplicated genetic material carried in the nucleus of a parent cell into opposite ends of the cell and two nuclei are formed. Telophase is the final stage of meiosis and mitosis, in which the detached chromosomes reach the opposite poles of the dividing cell and the nuclei .
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the process by which a nerve cell recaptures some of the neurotransmitters it has released is known as .
Important aspect of business is the process by which some small molecule transmitters are retrieved by the presynaptic terminal.
What are neurotransmitters and what do they do?Your body can't function without chemical messengers called neurotransmitters. These are charged with transmitting chemical "messages" through one neurons (nerve cell) to a succeeding target tissue. The following cell line may be a glandular, muscle, or another nerve cell.
What is controlled by neurotransmitters?Neurotransmitters, which are produced by nerve cells, also known as neurons, are crucial components of this system. Impulses are fired by nerve cells. By releasing neurotransmitters, also referred to as the body's chemical messengers, they achieve this. These substances send messages to other cells.
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which description correctly identifies a nucleotide?a nucleotide consists of a five carbon sugar bonded to a phosphate.a nucleotide has three main parts: a phosphate, a sugar, and a nitrogenous base.nucleotides are formed by a dehydration reaction between two or more nucleic acids.a nucleotide consists of billions of dna monomers that are condensed using histone proteins.
The correct description of a nucleotide is: a nucleotide has three main parts: a phosphate, a sugar, and a nitrogenous base.
Sugar in a nucleotide is comprised of 5 carbons. It can be of two types depending on the type of nucleotide it will be present in. These are: ribose sugar and deoxyribose sugar. Ribose sugar is present in RNA and deoxyribose sugar is present in DNA.
Nitrogenous base is the nitrogen containing compound that forms an essential part of he nucleic acids. There are total 5 nitrogenous bases: Adenine, Guanine, Cytosine, Thymine and Uracil. Out of these adenine and guanine are purines while Cytosine, Uracil and Thymine are pyrimidines.
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q016) the technique that injects oxygen and nutrients into a contaminated aquifer in order to foster the growth of bacteria that can break down contaminant molecules is called a. effluent injection. b. plume extraction. c. bioremediation. d. napl injection.
The technique that injects oxygen and nutrients into a contaminated aquifer in order to foster the growth of bacteria that can break down contaminant molecules is called bioremediation.
Hence, option C is correct.
What is the process of bioremediation?A biotechnological procedure called bioremediation is used to reduce or remove pollution. It is a kind of waste management strategy that employs organisms to either remove or use pollutants from a polluted region.
What chemicals are used in bioremediation?Cytochrome P450s, laccases, hydrolases, dehalogenases, dehydrogenases, proteases, and lipases are some of the most prominent enzymes used in bioremediation. These enzymes have shown promise in the potential degradation of polymers, aromatic hydrocarbons, halogenated compounds, dyes, detergents, agrochemical compounds, etc.
Thus from above conclusion we can say that the technique that injects oxygen and nutrients into a contaminated aquifer in order to foster the growth of bacteria that can break down contaminant molecules is called bioremediation.
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