In which example(s) below are models being used to make predictions and plan for the future?
a. A policeman clocking the speed of a motorist with a radar gun.
b. Someone checks the weather forecast for the weekend.
c. An evolutionary biologist estimates fitness by measuring gene frequencies over time.
d. All of the above.
B
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What will be an ideal response?
Kisspeptin is a protein that in humans has an important role in initiating secretion of the releasing factor gonadotropin-releasing hormone (GnRH)
Endocrinologists are finding that the protein kisspeptin and its receptor are central to sexual maturation at puberty. If kisspeptin directs the release of GnRH, you would expect that the receptors for kisspeptin will be found in cells of the: A. anterior pituitary. B. posterior pituitary. C. hypothalamus. D. gonads.
A subordinate animal in a dominance hierarchy has limited access to food and mates. The most likely reason he
remains in a social group that dominates him is because ____.
a. he is exhibiting altruistic behavior b. his chances of survival and reproduction are better in the group than alone c. he expects to become dominant in the future d. he does not know that it would be an advantage for him to leave e. dominant group members will not allow him to leave
The most widely used light microscope transmits light through a live specimen to produce an image where the specimen is darker than its surroundings. What type of microscope is this?
A) bright-field B) dark-field C) differential interference D) electron