Which of the following would be most effective in reducing the amount of CO2 in the atmosphere?
A. cyanobacteria
B. anaerobic microbes
C. heterotrophic organisms
D. fungi
E. nitrogen fixers
Answer: A
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Predict what would happen if an embryonic epidermal cell switched from expressing Ecadherin to N-cadherin
A. The cell would leave the epidermis and join the neural cells. B. The cell would become a neural cell. C. The cell would die. D. There would be no effect.
Which event could result in speciation?
a. A bird develops a mutation that affects the shape of its feathers. b. A mouse is infected by a virus that changes its feeding cycle. c. A fish produces eggs with DNA transcription errors. d. A horse stretches to reach apples growing from a tall tree.
Which structure places a fish in the class Actinopterygii?
a. swim bladder b. pharynx with gills c. nerve chord d. fleshy lobed fines e. more flexible fins with less bone
The glomerulus
A. is a set of blood vessels. B. secretes glucose into the circulatory system. C. allows large and small molecules to enter Bowman's capsule. D. regulates what molecules enter Bowman's capsule.