Approximately what percentage of the energy in one trophic level is incorporated into the next trophic level?
A. 1%
B. 30%
C. 100%
D. 10%
E. 60%
Answer: D
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Primates are associated with all of the following except
Select one: a. nails rather than claws. b. a larger brain (cerebral) volume. c. opposable thumb and sometimes large toe. d. eyes on the sides of the head. e. good hand-eye coordination.
Truffles are _______.
A. the mycelium or vegetative part of a fungus B. underground fruiting bodies of a type of fungus that lives in symbiosis with certain species of trees C. sporophytes D. nodules that form as part of the roots of legume plants like beans and peas
In order to transfer gene a to an F- cell, the sex pilus must be in place for at least ____ minutes
a. 0 b. 6 c. 10 d. 14 e. 25
A 38-year old woman is going to ovulate in about a week. For how long has the primary oocyte in her Graafian follicle been arrested at prophase I of meiosis?
A. About a day B. 1 week C. 3 weeks D. 38 years