____ is characterized by cold temperatures, little precipitation, and few or no trees
a. Taiga
b. Chaparral
c. Savanna
d. Tundra
e. Desert
d
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When crossing an organism that is homozygous recessive for a single trait with a heterozygote, what is the chance of producing an offspring with the homozygous recessive phenotype?
A) 0% B) 25% C) 50% D) 75% E) 100%
Which of the following is a correct description of the fate of the germ layers?
A) The mesoderm gives rise to the notochord. B) The endoderm gives rise to the hair follicles. C) The ectoderm gives rise to the liver. D) The mesoderm gives rise to the lungs.
Which molecule passes through a lipid bilayer most readily?
A. carbon dioxide B. glucose C. K+ D. arginine E. RNA
Triploblastic refers to animals that
A. form three blastopores in each blastula. B. form three separate blastulas from a single embryo. C. produce three eggs, each of which forms a single blastula. D. have a blastula composed of three cells. E. have three germ layers.