Make organic compounds Organisms that make their own organic compounds from inorganic substances are called
a) animals.
b) animorphs.
c) heterotrophs.
d) autotrophs.
Answer: d) autotrophs.
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The increase in a predator's reproduction in response to an increase in the consumption of prey is known as the predator's ________ response
Fill in the blank(s) with correct word
A fossil was found and determined by radiometric dating to be 11,400 years old. What is the ratio of carbon-14 to carbon-12 in this fossil compared to its environment?
A) 12.5% B) 25% C) 37.5% D) 50%
Why do sugars tend to be highly water soluble?
A) because of their large numbers of hydroxyl groups B) because of their large numbers of methyl groups C) because of their small molecular weights D) because of their large numbers of sulfhydryl groups E) because they have only a few hydroxyl groups
Cottonwood, aspen, and willow trees have beige flowers, with no petals, that appear before the tree's leaves are out in the spring; and they are dioecious. What does this indicate about these trees?
A) Their insect pollinators are specialists. B) Early emerging insects are probably the pollinators. C) Their pollen is dispersed by wind. D) The trees are self-pollinating.