Which of the following is an example of epigenetic inheritance?
A. inheritance of a beneficial allele in offspring
B. development of skin cancer in a parent and child due to extensive sun exposure and subsequent UV DNA damage
C. requirement of some plant species to experience cold temperatures before they are able to initiate flowering
D. a paternal response to low nutrition resulting in a modification of DNA in developing sperm
E. inheritance of an environmental sensitivity to oxygen levels in the expression of specific genes in a species of fish
Answer: D
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Figure 16.14 A series of reconstructions
of the drifting continents.
The continents of South America and Africa separated around ______ . 1.65 mya 2.150 mya 3.C200 mya 4.C240 myaWater soluble hormones ____
a. are derived from cholesterol b. interact with DNA receptors c. include estrogen and testosterone d. pass through target cell membranes e. require second messenger systems
When browsing the Internet you will often come across "miracle weight-loss" products that guarantee that you will lose weight if you use them. Which of the following would be the best controlled experiment to test this assertion?
A) have a single person use the product for one month and take "before" and "after" pictures B) have a group of adults use the product for two months and measure how much weight they lost C) compare the change in weight after one month for a group of adults that used the product for one month and a group of adults who did not use the product for one month D) determine the BMIs of a group of adults who used the product for two months and compare them to the BMIs of a group of adults who exercised vigorously daily for two months
Neurotransmitters are stored in vesicles at the nerve terminal. Assuming a neurotransmitter is a protein, where was it synthesized?
A. the cytoplasm B. the rough endoplasmic reticulum C. the Golgi apparatus D. the lysosome