In heterotrophs, energy for the life processes comes from the chemical energy stored in the bonds of...
a) oxygen molecule
b) organic compounds
c) water molecules
d) inorganic compounds
Ans: b) organic compounds
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At which stage is the foreign gene introduced into the developing embryo?
a. blastocyst, via a transgenic cell b. egg, via direct microinjection of the new DNA c. sperm, via direct microinjection of the new DNA d. in cell culture, prior to fertilization e. it all depends on the method the particular researcher prefers.
A homeotic mutant flower has an arrangement (from outside in) of carpels, stamens, stamens, carpels instead of the usual sepal, petals, stamens, carpels
In general, Class A genes specify sepals, Class A and B genes specify petals, Class B and C genes specify stamens, and Class C specifies carpels. This mutant must therefore have a mutation in __________. A) a Class A gene B) a Class B gene C) a Class C gene D) both A and B E) both B and C
________ is the process whereby leukocytes move across the endothelial layer and through the blood vessel wall.
A) Diapedesis B) Chemotaxis C) Internalization D) Margination E) Attachment
Which of the following tissue types is specialized to conduct electrical signals?
A. Muscle B. Nervous C. Epithelial D. Connective E. Both nervous and epithelial tissue are correct.