Which one of the following statements is TRUE regarding the mitotic phase of the cell cycle?
A) The mitotic phase is longer than interphase.
B) During cytokinesis, the cytoplasm divides and four daughter cells result.
C) During mitosis, DNA is divided into two sets and distributed equally to the daughter cells.
D) DNA of the cell is replicated during this phase.
E) Most of the growth of the cell occurs during this phase.
C
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Microbiota of the skin are most likely to be found
A. in association with oil and sweat glands. B. where there is little moisture. C. where the pH of the skin secretions is below 4. D. All of the choices are correct.
The body of a fungus has several characteristics. One of these is their hyphae, long chains of cells. Which of the following statements best describes the nature of septa and cross walls?
A. Septa of the cross walls are formed on the outside of fungal cells and give the fungal body more rigidity. B. Septa form cross walls between the long chains of cells that make up hyphae. C. The cross wall within the nuclear membrane of every fungal body forms septa. D. Spores of fungi that are formed within reproductive structures have cross walls separated by septa. E. Cross walls are responsible for the formation of spindle plaques within the hyphae after the septa are produced.
Global deforestation remains a major concern as huge tracts of rainforest are cut down each day. How does the removal of such large numbers of trees from the world's forests affect the concentration of carbon dioxide in the atmosphere?
A. The concentration of carbon dioxide increases, which has a warming effect on the climate. B. The concentration of carbon dioxide increases, which has a cooling effect on the climate. C. The concentration of carbon dioxide decreases, which has a warming effect on the climate. D. The concentration of carbon dioxide decreases, which has a cooling effect on the climate. E. The concentration of carbon dioxide remains unchanged, with no effect on the climate.
Mutation and migration introduce new alleles into populations. What is the most likely principal force that will shift allelic frequencies within large populations?
What will be an ideal response?