Which of the following types of organisms uses inorganic molecules as an energy source?
a. photoautotrophs
b. chemoautotrophs
c. net primary producers
d. net primary consumers
b. chemoautotrophs
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Detail the mechanism by which halophilic Archaea obtain energy from light
What will be an ideal response?
If the regulation of hunger and thirst mechanisms goes haywire, the brain region that is most likely damaged is the
A. cerebrum. B. cerebellum. C. thalamus. D. hypothalamus. E. medulla oblongata.
Why do we have storage macromolecules, such as fats, in our bodies?
A. Human cells can directly capture the energy of sunlight through photosynthesis and store it as macromolecules such as fats. B. We can break down these macromolecules to provide energy for the endergonic reactions in our bodies. C. Breaking down macromolecules, such as fats, is an endergonic process. D. Macromolecules, such as fats, are a convenient way to store kinetic energy.
Two populations of catfish have lived in separate neighboring lakes for many generations. Population A contains about 30% short whiskered catfish (ww) and 70% long whiskered catfish (WW or Ww); Population B contains about 10% short whiskered catfish and 90% long whiskered catfish. Following a year of record rainfall, both lakes rise enough to allow the catfish populations to swim between the two lakes and interbreed. What will be the effect(s) over time of this interbreeding?
A. Population A will see an increase in long whiskered fish and Population B will see an increase in short whiskered fish. B. Population A and Population B will experience an increase in genetic diversity. C. Population A will see an increase in long whiskered fish, but Population B will not see any changes in the prevalence of the two phenotypes. D. DIfferences in the frequencies of W and w between the two populations will decrease. E. DIfferences in the frequencies of W and w between the two populations will increase. F. Population B will see an increase in short whiskered fish, but Population A will not see any changes in the prevalence of the two phenotypes.