The following compounds are produced by plants during the day and broken down at night, except _____________.
A. rubisco
B. photosystem II
C. ATP synthase
D. photosynthetic proteins
E. carbon dioxide
Answer: E
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The organism that causes malaria is
(a) a pathogen. (b) Plasmodium vivax. (c) carried by a mosquito. (d) all of the above.
You are breeding different varieties of roses in your garden. When you cross a true-breeding yellow "Texas Beauty" rose with a true-breeding "Ruby" red rose, you get all red roses. But when you cross a "Texas Beauty" yellow with the yellow variety "Jealousy," you get a 9:7 ratio of red to yellow flowers! What can you conclude from these results?
A. The environment, and not genes, influences pigment in these rose varieties. B. There are epistatic interactions between at least two genes for rose pigment. C. The red allele is dominant to the yellow allele. D. There is a mutation in the gene for yellow pigment in the "Jealousy" variety. E. There is no recessive allele for the red pigment gene.
Why is it unlikely that we will find fossils of
every extinct species?
a. Most dead organisms are eaten by scavengers. b. Organic remains decompose. c. Not all species have hard parts like bones or teeth. d. Most fossils are buried too deep for us to find. e. More than one of these is correct
The hypothalamus and pituitary link the activities of the endocrine system and nervous system by
a. neurohormones being secreted in response to the summation of neural messages that enter the hypothalamus. b. shifts in hormonal concentrations being detected by the anterior pituitary. c. pheromones being secreted as a response to photoperiodic stimuli. d. the nervous tissue of the anterior lobe of the pituitary sending stimuli to the glandular tissue of the posterior pituitary to produce hormones that will be secreted by the hypothalamus. e. direct neural connections.