A biologist is studying how pollution affects algal growth and snail populations in a portion of Lake Erie. What level of organization is she studying?

a. population
b. community
c. ecosystem
d. cells


ecosystem

Biology & Microbiology

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Plant growth that elongates stems occurs in the:

A. shoot apical meristem. B. root apical meristem. C. shoot lateral meristem. D. root lateral meristem. E. internode.

Biology & Microbiology

Answer the following statements true (T) or false (F)

1, In insects, as in humans, the presence of a Y chromosome determines maleness. 2, If you were to examine a typical population at a single locus, you would find more copies of the wild-type allele than any other allele. 3, An individual with an SRY gene is a male mammal. 4, Only fathers can pass on pattern baldness to their sons.

Biology & Microbiology

True jellyfish belong to the class Scyphozoa of the phylum Cnidaria

Indicate whether the statement is true or false

Biology & Microbiology

Active phytochrome controls

a. flowering and seed set. b. seed germination. c. stem branching and elongation. d. expansion of leaves. e. all of these.

Biology & Microbiology