Why do many plants use the photoperiodic pathway to regulate the timing of flower formation?
A. Flower petals carry out high levels of photosynthesis and require high light conditions.
B. A minimum amount of light is always necessary for flowering.
C. This allows plants to link flowering to temperature, which corresponds to the season when conditions are optimal.
D. This allows plants to link flowering to day length, which corresponds to the season when conditions are optimal.
D. This allows plants to link flowering to day length, which corresponds to the season when conditions are optimal.
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Plant viruses may be transmitted by
A. worms. B. contaminated seeds. C. humans. D. insects. E. All of the choices are correct.
A species has 6 chromosome pairs in each diploid cell. How many genetically unique gametes could be produced from sexual reproduction in this species, accounting only for independent assortment?
A. 64 B. 8 C. 36 D. 9 E. 16
For this problem, you may want to create a
Punnett Square on a separate piece of paper. Manuel has both cystic fibrosis, a recessive disorder, and sickle cell anemia which is also a recessive disorder. Manuel’s partner, Lucretia, is normal for both conditions. What is the probability that Manuel and Lucretia will have a normal child without either of the conditions Manuel has?
a. 0% b. 25% c. 75% d. 100% e. it is not possible to solve this problem with the information provided
The archea include which of the following?
a. extreme thermophiles b. alga c. protista d. animals e. all of these