Answer:
D) all above
Explanation:
short answer
Answer:
The correct statement would be - the bacterial cell due to the largest surface-to-volume ratio.
Explanation:
The surface area to volume ratio plays a very important role in determining the rate of the diffusion enter and exit from the cell body. If the surface-to-volume ratio is lower then the rate of diffusion would be lower to similarly with an increase in the ratio, the rate of diffusion also increases.
So, the bacteria like small organism have a cell which is exposed to a large surface area to the surrounding in comparison of the human egg cell.
Thus, the correct answer would be - the bacterial cell due to the largest surface-to-volume ratio.
A smaller spherical bacterial cell with a radius of 3μm can more efficiently exchange materials with the external environment compared to a larger human egg cell with a radius of 100μm, due to its higher surface area-to-volume ratio.
The statement that correctly indicates the cell that is able to more efficiently exchange materials with the external environment is that the spherical bacterial cell with a radius of 3μm can more efficiently exchange materials. This is because a smaller cell has a higher surface area-to-volume ratio, allowing for a faster exchange of materials through the cell membrane. On the other hand, the human egg cell with a radius of 100μm, being larger, has a lower surface area-to-volume ratio and is less efficient in exchanging materials with the external environment.
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acidic water is not an consequence of early spring but an effect on marine ecosystems.
Answer:
hypertonic
Explanation:
During a hurricane, the plants in freshwater marshes die because the invading saltwater is hypertonic (B), meaning it has a higher solute (salt) concentration. This causes water from inside the cells to move out into the surrounding saltwater, which can lead to the cells losing so much water that they die.
During a hurricane, salt water invades fresh water marshes causing many of the plants to die and ultimately the loss of soil. This is because the salt-water solution is Hypertonic to the plants, which ends up drawing water from the plant cells.
A hypertonic solution has higher solute concentration (in this case, salt) than the inside of the plant cells.
Given that osmosis is the movement of water from an area of lower solute concentration to an area of higher solute concentration, the water inside the cells moves out into the surrounding saltwater, which can result in the cells losing too much water and dying.
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B) biogeographic isolation affects the changes in gene pools that result from which organisms are breeding
C) biogeographic isolation determines who will win competition for mates
D) biogeographic isolation determines the time that populations will breed
Correct answer: A) bio-geographic isolation affects the random changes that take place within gene pools
The bio-geographic isolation of the species takes place when the geographical barrier work as a distinguishing agent. It takes place when the group of animals, plants and other creatures are not allowed to mate with each other.
The mixing of there genes within the same species is separated by the geographical barrier.
The barrier allows the mating of the species in a different way as compared to the previous one.
Biogeographic isolation allows for the change of gene pools over time as (A) biogeographic isolation affects random changes that take place within the gene pool.
Further Explanation:
Evolution is defined as the process of change in the heritable characteristics. This process takes over in time duration of a few generations. The heritable characteristics are the expressions of genes that are passed on from parents to offspring. Evolution may occur through various processes such as genetic drift, natural selection.
Genetic drift is defined as the variation of the relative frequency of varieties of genotype. There is a chance of disappearance of a particular trait from the population.
Natural selection is defined as a process that results in the adaptation of an organism to its environment in which the individual can reproduce and survive.
Gene pool refers to the collection of all available genes that are available to pass down from parents to offspring in the population of single species. The gene pool determines which phenotypes are present in the population at a given period.
Isolation refers to the process in which organisms of the same species are separated as a result of environmental change. This process occurs so that variation can be brought. When organisms become isolated the two groups are not able to reproduce together so, variations and mutations that are confined only to a group.
The following are the five types of isolation;
• Temporal isolation
• Behavioral isolation
• Ecological isolation
• Geographical isolation
• Mechanical or Chemical isolation
Biogeographic isolation refers to the separation of members of different species through geographical or biological barriers. This isolates the reproductive patterns of the members of the same population and results in the new way of mating in the isolated species. The species that are isolated genetically due to mutations and variations. These isolated groups evolved and lead to the formation of new species.
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Answer Details:
Grade: College Biology
Subject: Biology
Chapter: Evolution
Keywords:
Evolution, genetic drift, natural selection, gene pool, mutations, isolation, phenotype, variations, biogeographic isolation, ecological isolation, temporal isolation, behavioral isolation, mechanical isolation, geographic isolation.
Meiosis is the reductional division which takes place in organisms which reproduce by the process of sexual reproduction. It produces haploid cells to maintain the chromosome number constant in the offpsring.
Meiosis is a type of cell division which results in the reduction of chromosome number in the cell by half of its original number. Meiosis is also known as reductional division.
Meiosis takes place in the process of formation of gametes in the organisms which reproduce by sexual mode of reproduction. In meiosis, four daughter cells are produced, which are haploid. The male and female gametes produced by meiosis under fertilization to form zygote which is diploid. If the gametes were not haploid then the offspring will show presence of extra set of chromosome which can lead to chromosomal disorders.
Learn more about Meiosis here:
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Answer:
The overall process of meiosis produces four daughter cells from one single parent cell. Each daughter cell is haploid, because it has half the number of chromosomes as the original parent cell. "Meiosis is reductional," said M.