Which respiratory structure likely has the largest surface area for gas exchange to occur?

A) the body surface of a worm
B) the lungs of a pig
C) the tracheal system of a house fly
D) the gills of a trout


Answer: B

Biology & Microbiology

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Sea stars are classified in which of the following Echinoderm classes?

a. Asteroidea b. Ophiuroidea c. Echinoidea d. Crinoidea

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Compact bone is indicated by

a. A. b. B. c. C. d. D. e. E.

Biology & Microbiology

_____ and _____ signals control the cell cycle

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

Consider a sample of 100 individuals sampled from a population in Hardy–Weinberg equilibrium that are gen-otyped at the single locus

Of these 100 individuals, 25 individuals are A1A1 homozygotes, 45 are A1A2 heterozygotes, and 30 are A2A2 homozygotes. Please list the observed and expected genotypic frequencies of this locus in this sample What will be an ideal response?

Biology & Microbiology