Why are chromosomes more easily visible under the microscope during metaphase as compared to G2 phase?
What will be an ideal response?
They have condensed 10,000-fold.
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Consider the structure of a trophic pyramid when answering the following questions: Why would the world be better off if all humans were vegetarians?
A. More energy can be obtained as a primary consumer, supporting more primary consumers. B. There are more vitamins in plant tissue than in animal tissue; primary consumers would be healthier. C. Eating vegetables is healthier than eating animals.
Strong chemical mutagens may be used to treat cancer cells. Is this a good or bad idea?
A. Good-kill those cancer cells as quickly as possible to cure the patient! B. Bad-these mutagens will also affect the non-cancerous cells, possibly leading to new cancerous states! C. Good and bad-they're very good at killing cancer cells, but depending on mode of administration, they could also be dangerous to non-cancerous cells. D. Bad-the cancer cells are already mutated. We don't want to mutate them more and make them more cancerous!
Which of the following germ layer-structure is mismatched?
A. mesoderm-notochord B. endoderm-lungs or respiratory tube C. ectoderm-epidermis D. mesoderm-digestive tract E. ectoderm-brain
On a dare, a student challenges another student to lick a California newt (Taricha torosa). From which population of newts should the student grab an individual to reduce his or her risk of a toxic dose?
A) from a population with no garter snakes B) from a population with a low abundance of garter snakes C) from a population with a medium abundance of garter snakes D) from a population with a high abundance of garter snakes