The first function of feathers was most likely:a

protection from predators.
b. insulation.
c. communicating with rivals.
d. climbing in trees.
e. protection from parasites


B

Biology & Microbiology

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_____________ results in the oxidation of NH3 to form NO3-, and _______________ relies on the reduction of NO3- to form N2

A. Anammox; nitrogen fixation B. Nitrogen fixation; anammox C. Denitrification; nitrogen fixation D. Nitrification; nitrogen fixation E. Nitrfication; denitrification F. Denitrification; nitrification

Biology & Microbiology

If one strand of a DNA molecule read

ACCTTGAC, what would the other side read?

a. ACCTTGAC b. TGGAACTG c. GTTCCAGT d. CAAGGTGA e. none of these

Biology & Microbiology

In comparing mitosis and meiosis, which of the

following statements is true? a. Meiosis I is more like mitosis than is meiosis II. b. Both processes result in four cells. c. Pairing of homologues occurs in both. d. Chromatids are present only in mitosis. e. Meiosis II resembles mitosis.

Biology & Microbiology

What is an advantage of the economy of scale?

a. division of labor c. sexual reproduction b. ability to eat more food d. multicellularity

Biology & Microbiology