Which disease is dangerous to the embryo if the
mother develops the disease early in pregnancy?
a. German measles
b. chicken pox
c. red measles
d. hepatitis
e. mumps
Answer: a
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Four elements, including ____, make up more than 96% of the mass of most living organisms
a. sodium b. potassium c. phosphorus d. nitrogen e. calcium
Genetically, Methanococcus is most closely related to ____
a. bacteria b. fungi c. plants d. both bacterial and eukaryotic cells, although not closely related to either. e. animals
In poultry, the genes for rose comb (R) and pea comb (P) produce walnut whenever they occur
together (R__ P__); single-combed individuals have the homozygous condition for both genes (rr pp). (a) Give the F1 and F2 phenotypic results of a cross of a pure-breeding rose comb (RR pp) with a pure-breeding pea comb (rr PP). (b) Give the phenotypic results of a cross of Rr Pp ? rr Pp. (c) Give the phenotypic results of a cross of RR Pp ? rr Pp. (d) Give the phenotypic results of a cross of Rr pp ? rr Pp. (e) Give the phenotypic results of a cross of Rr Pp ? rr pp. What will be an ideal response?
Which of the following is an example of an herbivore?
a. an earthworm b. a sheep c. a human d. a pig e. a fish