Which is false regarding rotifers?
a. Most live in freshwater habitats.
b. Males are unknown in some species.
c. They share a common ancestor with annelids.
d. They have a pseudocoelom.
e. None of these are false.
Answer: e
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If the age of the Earth is 4.6 billion years old, for what percentage of this time is Earth thought to have been anaerobic?
A. 0.1% B. 27% C. 44% D. 68% E. 99.3
A researcher decides to test the scientific validity of the common phrase “An apple a day keeps the doctor away.” What would be a valid hypothesis to investigate this specific question?
A. Eating apples decreases the frequency of contracting a cold. B. The daily consumption of a single apple does not change the number of visits to the doctor. C. Eating one apple every day is good for you. D. Apples are high in vitamin C. E. Those who consume apples have longer lifespans than those who do not consume apples.
To include your eyes and ears in the same section, you would need to cut your body in which plane?
a. median b. frontal c. sagittal d. transverse e. cephali
Which animals exhibit problem solving?
a. all vertebrates b. a few vertebrates, including primates c. only primates d. only humans
e. all vertebrates, and a few invertebrates