Which organisms are considered most primitive based upon the structure of their limbs?
A. Bats
B. Reptiles
C. Porpoises
D. Penguins
E. Birds
Answer: B
Biology & Microbiology
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Your father is heterozygous for the recessive disorder phenylketonuria (PKU). You know your mother has two "good"
alleles. You have a ____chance of having the disorder.
a. 0% b. 100% c. 25% d. 50% e. 75%
Biology & Microbiology
Which phylum is a member of the Parazoa clade?
a. Nemertea b. Porifera c. Rotifera d. Ctenophora e. Echinodermata
Biology & Microbiology
In general, transformation of most genes occurs at a frequency of one in every ________ cells
A) 10 B) 100 C) 1,000 D) 10,000 E) 1,000,000
Biology & Microbiology
A ring of vascular bundles in a stem is characteristic of:
A) monocots. B) non-flowering seed plants. C) many dicots. D) both monocots and dicots.
Biology & Microbiology