Which mode of reproduction is utilized by most aquatic invertebrates, fish, and amphibians?
A. Asexual reproduction
B. Pathenogenesis
C. External fertilization
D. Internal fertilization
E. Hermaphroditism
Answer: D
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Which of the following junctions are important for cell signaling?
A. adherins junctions B. gap junctions C. plasmodesmata D. desmosomes E. All of the choices are correct.
In rabbits, spotted coat (S) is dominant to solid color (s) and black (B) is dominant to brown (b). A true-breeding black spotted rabbit is mated to a true-breeding brown solid rabbit to produce a heterozygous F1 generation. Two F1 individuals are mated, and you do not see a 9:3:3:1 (black spotted: black solid: brown spotted: brown solid) ratio of offspring, but instead see that almost all offspring are a non-recombinant phenotype. This tells you that
A. that fur pattern (spotted vs. non-spotted) and fur color are maternally inherited. B. that the genes for fur pattern (spotted vs. non-spotted) and fur color assort independently. C. that the genes for fur pattern (spotted vs. non-spotted) and fur color are on different chromosomes. D. that the genes for fur pattern (spotted vs. non-spotted) and fur color are on the same chromosomes. E. that the genes for fur pattern (spotted vs. non-spotted) and fur color are epistatic.
Plants as well as brown, green, and red algae show a basic life cycle that involves the alternation of generations between a(n)
A. spore and pollen. B. egg and a sperm. C. seed and a cone. D. megaspore and a microspore. E. sporophyte and a gametophyte.
Lymphocyte receptors are encoded by genes that are assembled by rearrangement and mutation of what molecules?
A. DNA B. pre-mRNA C. tRNA D. mRNA