Conifers transmit chloroplast only through pollen. This:
a. leads to parthenogenesis.
b. inhibits parthenogenesis.
c. leads to recombination in chloroplast DNA when ovule and pollen chloroplast merge.
d. leads to imprinting of conifer nuclear genes.
B
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At the start of mitosis, how many centromeres are present in a human cell?
A. 12 B. 23 C. 46 D. 92
An enzyme that attaches a phosphate group to another molecule is called a _______________
A. phosphatase B. phosphorylase C. kinase D. cyclase
You are surveying biodiversity on a new island chain. You have counted the number of bat species on one island already. The next island is smaller and farther from the mainland than the one you have just surveyed
According to the theory of island biogeography, the total number of its bat species should be ____ than on the current island because the rate of immigration to the new island should be ____ and the rate of extinction should be ____ . Refer to Figure 46.17 in your text for help. Fill in the blank with the appropriate word.
The pigment responsible for photoperiodism is
a. chlorophyll. b. xanthophyll. c. anthocyanin. d. phytochrome. e. phytoerythrin.