Which of the following is true about bacteria?
a. most bacteria are harmful
b. bacteria only inhabit surfaces
c. we have more bacteria cells that our own
cells
d. bacteria are restricted in their distribution to
certain ecosystems
e. bacteria are the most common organisms in
the Domain Eukarya
C
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Changing a single amino acid in a protein consisting of 325 amino acids would _____
A) alter the primary structure of the protein but not its tertiary structure or function B) cause the tertiary structure of the protein to unfold C) always alter the biological activity or function of the protein D) always alter the secondary structure of the protein and disrupt its biological activity E) always alter the primary structure of the protein, sometimes alter the tertiary structure of the protein, and sometimes affect its biological activity
An mRNA molecule is also called a(n)
A) intron. B) transcript. C) gene. D) proscript.
An example of a fluid feeder is a
a. hummingbird. b. lamprey. c. mosquito. d. snake. e. hummingbird and a mosquito.
Peacocks are males and peahens are females of a sexually dimorphic species. How could you test whether a peacock's tail was an important cue for peahen egg production?
A) Relate size of male tail to female tail. B) Remove tails from females and measure corresponding egg production. C) Remove tails from courting males and measure corresponding female egg production. D) All of the above answers apply. E) A and C are equally good answers