Which soil horizon has no organic matter or
weathered rock?
a. A
b. B
c. C
d. D
e. E
E
Biology & Microbiology
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Photosynthesis is conducted in ___________
a. the cell wall b. chloroplasts c. the nucleus d. the cell membrane
Biology & Microbiology
The letter “C” in the above figure represents
a. pericycle b. endodermis c. primary xylem d. root cortex e. primary phloem
Biology & Microbiology
The basic unit of the nervous system is
a. the neuron. b. neuroglia. c. the brain. d. a nerve. e. a nerve impulse.
Biology & Microbiology
According to the theory of common descent, how should each species on Earth today compare?
A) They should look very similar to all other species. B) They should not have ancestors in common with members of other species. C) They should have a single ancestor in common. D) They should have DNA that is mostly unique from other species.
Biology & Microbiology