Organisms that depend on the energy stored in chemical bonds by other organisms for their food energy are called ________.
A. Chemotrophs
B. Autotrophs
C. Oligotrophs
D. Heterotrophs
Answer: D
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The inclusive term that describes all of the DNA in the nucleus of a cell is its
A. genome. B. chromosome. C. gene. D. proteome.
Which of the following observations suggested that blending was, at best, an incomplete explanation for inheritance?
a. all of the choices b. parents without freckles have children with freckles c. a mating between a white and black horse rarely produced gray offspring d. a cross between white-flowered and purple-flowered pea plants never produced lavender-flowered offspring
In some plants, flowering is a _____ response
a. phototropic c. photoperiodic b. gravitropic d. thigmotropic
Which of the following tissues is least likely to
have replacement stem cells in an adult?
a. muscle b. bone c. blood d. skin e. liver