How do turtles differ from other reptiles
(excluding birds)?
a. they are mostly predators
b. they do not have internal fertilization
c. they give birth to live young
d. they do not have teeth
e. they must live part of their live in water
D
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Fishing by humans has severely affected populations of many different marine species, including whales. Examine the figure above, making sure to note what each axis represents. What can best explain the pattern for minke whales?
A. Minke whales were too difficult to catch until they become malnourished due to exploitation competition by other whales. B. Minke whale populations were overfished in the early 1900s, then recovered in the 1970s as their competitors were killed off. C. Minke whales are a new species that evolved during the 1960s as an ecological niche opened up. D. Commercial whalers did not pursue minke whales until the more valuable whale species had declined.
gastric juice is produced by ___ in the stomach which lie in millions of _____
Fill in the blank(s) with the appropriate word(s).
A green automobile hood exposed to sunlight will produce far more heat than a green leaf exposed to the same amount of sunlight. Why is this?
a) The electrons in the pigment of the automobile hood have no mechanism for reaching an excited state, so all of the heat from the sun will be absorbed; in the leaf, the chlorophyll pigment provides a locus for excitation of electrons by light. b) The automobile hood has no mechanism for capturing the energy of its excited electrons, so it releases that energy as heat as the electrons fall back to their ground state; a leaf contains primary electron receptors, which will capture the energy and put it to use in making ATP and NADPH. c) The automobile hood has no mechanism for capturing the energy of its excited electrons, so it releases that energy as heat as the electrons fall back to their ground state; a leaf contains primary electron receptors, which will capture the energy and put it to use in making ADP and NADP+. d) The green color of the automobile hood is not the result of a pigment, while the green color of the leaf is the result of the chlorophyll pigment. e) The automobile hood absorbs heat from other sources, such as the engine and the pavement, while the leaf is cooled by the shade of other leaves.
Homologous chromosomes become attached to either ____ in prophase I.
A. sister B. spindle pole C. nucleus D. chromosome E. chromatid