Insects that lay their eggs in and whose larvae
subsequently feed on the soft tissues of the host are
a. typical parasites.
b. commensals.
c. parasitoids.
d. predators.
e. cannibalistic.
Answer: c
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The class of proteobacteria that may be incorporated into the gamma proteobacteria is the ________.
A. delta proteobacteria B. alpha proteobacteria C. beta proteobacteria D. epsilon proteobacteria
Because of the environmental impact of inorganic fertilizers, scientists are working to engineer plants that more efficiently acquire phosphate. Which options below are likely to achieve that goal? (check all that apply)
_____ Plants that express more phosphatase. _____ Plants that make mycorrhizal associations with fungi. _____ Plants that grow less complex root systems. _____ Smart plants that can sense phosphate levels. _____ Plants that secrete less organic acid.
Which of the following lifestyle changes would NOT boost the immune system?
A. reducing stress by practicing yoga B. walking 20 minutes a day C. eating amino acids D. reducing inflammation by using a cortisol supplement E. All of these actions will boost the immune system
When researchers studied knockout mice with no active copies of the Dvl1 gene, they found these micewere____
a. physically abnormal b. socially normal c. not easily startled d. physically and sociallynormal e. physically normal, but socially abnormal