Sexual reproduction in zygomycetes differs from sexual reproduction in basidiomycetes in one key way. Which of the following is true of zygomycetes, but not true of basidiomycetes?
A. Haploid nuclei fuse in the process of karyogamy to form a diploid nucleus
B. Mushrooms are formed of secondary (dikaryotic) mycelium
C. Gametangia of opposite mating types undergo plasmogamy
D. Meiosis to produce haploid spores is delayed, resulting in a discrete diploid state
Answer: D
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Answer the question using the accompanying figure. Of the fragments labeled A-D, which is closest to the negative
electrode?
a. A b. B c. C d. D e. they are all the same distance from the negative electrode
Human Hox genes are in four clusters: HOXA, HOXB, HOXC, and HOXD, for a total of 39 genes. Besides conserving the clustering of genes, evolution has also conserved __________
A) their chromosomal locations B) the order of the genes within them C) their expression along the dorsal-ventral axis D) the mutations to which they give rise E) their bilateral symmetry
After embryonic development, members of the phylum Rotifera are incapable of:
a. reproduction. b. cell division. c. locomotion. d. excretion. e. ingestion.
Territorial behavior always involves
A. communication between members of the same species. B. huge investments in time and energy. C. courtship behavior. D. All of these answers are true.