Which statement is true of embryonic splitting?
A. It never occurs in nature.
B. It involves the genetic contribution of only one parent.
C. It produces immediate differentiation.
D. It is applied in animal husbandry to produce genetically diverse offspring.
E. It produces identical twins.
Answer: E
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Which proteins move the farthest during SDS-polyacrlamide gel electrophroesis?
a) the most negative b) the largest c) the smallest d) the most positive e) both the largest and the most negative
The only protozoan that causes an STI that affects mostly women is
a) Trichomonas vaginalis. b) Gardnerella vaginalis. c) Mycoplasma hominis. d) Haemophilus ducreyi.
Cellulose is _____
A) a polymer composed of fructose monomers B) a storage polysaccharide for energy in plant cells C) used by plants to make glycogen D) a major structural component of plant cell walls E) a monomer of starch.
Consider two islands located an equal distance from the mainland (colonization source). One island is large, the other is small. Which island will have a higher rate of change in species composition?
A. the small island B. the large island C. The rate of change in species composition will be the same on both islands. D. Species composition does not change at equilibrium.