Which of the following is a function of roots?
A) absorbs water only
B) absorbs nutrients from the soil only
C) stores food only
D) stores food and absorbs water and nutrients from the soil
D
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CAM and C4 have evolved multiple times in a range of vascular plants because __________. (Select all correct answer options.)
A. no novel enzymes or biochemical pathways are required B. C4 and CAM photosynthesis likely evolved from C3 ancestors C. gene expression changed D. land plants evolve rapidly
An example of a density-dependent factor that influences the size of a population is:
a. rainfall. b. temperature. c. a fire. d. parasites. e. an earthquake
T or F: a mediolateral axis runs from front to back
What will be an ideal response?
Consider a biallelic locus with alleles A1 and A2. A1 mutates to A2 with a forward mutation rate of 0.0000025. A2 mutates back to A1 with a reverse mutation rate of 0.0000010. What will be the equilibrium frequency of the A1 allele?
a. 0.0407 b. 0.1298 c. 0.1820 d. 0.2857 e. 0.3869