As a rule of thumb, how much of the food energy taken in by an herbivore is passed on to a carnivore (primary consumer)?
A. 10%
B. 1%
C. 5%
D. 90%
E. 50%
Answer: A
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When an enzyme becomes denatured, it
(a) increases in effectiveness. (b) loses its requirement for a substrate. (c) forms an enzyme–substrate complex. (d) loses its ability to function.
Fifty-million sperm were examined for mutations in a specific gene and 100 mutations were found. What was the mutation rate for this gene?
A) 5 × 10?6 B) 50 × 10?6 C) 2 × 10?6 D) 2 × 10?5 E) 5 × 10?5
The function of vertebrae is to
A. protect the brain. B. protect the nerve chord. C. protect the nerve cord and provide attachment points for muscles. D. provide attachment points for muscles. E. protect the brain and nerve cord.
Where on this phylogenetic tree of primate evolution do you find evolution of the hominines?
A. No. 1 B. No. 2 C. No. 3 D. No. 4 E. No. 5