Why must the life cycle of sexually reproducing species alternate between haploid and diploid stages?
A. Haploid cells cannot grow independently of diploid cells.
B. Meiosis must occur at some point in the life cycle to prevent a doubling of chromosomes in each generation.
C. Meiosis must occur at some point in the life cycle to prevent a reduction of chromosomes in each generation.
D. Mitosis must occur at some point in the life cycle to prevent a reduction of chromosomes in each generation.
E. The diploid stage allows for genetic recombination.
Answer: B
You might also like to view...
Reabsorption is the movement of water and solutes from the ____ to the ____
a. interstitial fluid; nephron tubules b. glomerular capillaries; Bowman's capsule c. Bowman's capsule; nephron tubules d. nephron tubules; peritubular capillaries e. glomerular capillaries; peritubular capillaries
Some viruses can carry their genes as ________.
A. DNA B. RNA C. protein D. two of the above E. all of the above
The process of aging is called
A) senescence. B) abscission. C) death. D) maturation. E) elongation.
An epidemiologist is investigating a new disease and observes what appear to be bacteria inside tissue cells in clinical samples from victims. The scientist wants to try to isolate the bacteria in the lab. What culture conditions are most likely to be
successful? A) culturing on blood agar plates B) inoculation of EMB plates C) incubation in an anaerobic culture system D) inoculation of cell cultures E) inoculation of a minimal medium broth