more efficient in producing carbohydrates
b. predominates in C3 plants in cool weather when
water is plentiful.
c. predominates in C4 plants on hot days.
d. produces the same amount of PGA.
e. does none of these.
Answer: e
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Individuals that are heterozygous for sickle-cell anemia are more resistant to malaria than those that do not have a sickle-cell allele. Why does the sickle-cell allele not become fixed in the population?
A. Individuals homozygous for the sickle-cell allele do not have the same resistance to malaria. B. Individuals that are homozygous without the sickle-cell allele produce more offspring than those with the sickle-cell allele. C. Individuals that are homozygous for the sickle-cell allele have sickle-cell anemia, and are at a fitness disadvantage. D. Individuals heterozygous for the sickle-cell allele die earlier than either of the homozygous individuals. E. Analysis indicates the allele is becoming fixed in the population.
The administration of the drug diclofenac to livestock inadvertently poisoned ____ and led to an increase in ____
cases.
a. cattle; hoof and mouth b. vultures; rabies c. children; epilepsy d. coyotes; hemolytic E. coli e. cattle egrets; avian flu
Refer to Figure 26-3. The structure at point 6 in the life cycle:
a. is a zoospore.
b. was produced by mitosis.
c. was produced by meiosis.
d. is diploid.
e. is a structure in which mitosis occurs.
During wine-making, yeast cells obtain energy by fermenting sugar. Alcohol and CO2 are products of this process. When alcohol content reaches a certain level, the yeast cells can no longer survive. The limiting factor to yeast growth in this example is the
A. availability of raw materials. B. availability of energy. C. production of waste products. D. interactions with other organisms.