Prior to mating, a male widowbird produces sperm cells through the process of __________
When the sperm fuses with an egg cell, __________ has occurred.
a. meiosis; fertilization
b. fertilization; meiosis
c. sexual selection; meiosis
d. fertilization; mutation
A
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Why are genes associated with nitrogen fixation not typically used to identify bacteria species? (Select all correct choices.)
A. Their sequences are similar to those of rRNA genes. B. These genes are not typically exchanged between bacteria by horizontal gene transfer. C. These genes are often exchanged between bacteria by horizontal gene transfer. D. Every bacterium contains nitrogen fixation genes.
In which way are photosynthesis and cellular respiration related?
a. They both store heat. b. They both release oxygen. c. They both store energy. d. They both use the waste material of the other.
What plant growth regulator(s) inhibits growth of the plant, and opposes the action of the growth-promoting regulators?
a. gibberellins b. ethylene c. abscisic acid d. cytokinins e. auxins
Which of the following is NOT an environmental justice issue?
A. industrial complexes built in poor neighborhoods B. food recall of high-priced fresh fish affecting mostly wealthy consumers C. extreme weather associated with global climate change taking the lives of the homeless D. rising sea levels associated with global climate change threatening remote coastal islands E. landfills built in poor neighborhoods