Sponge larvae:A
are miniature sponges that float about in the plankton.
B. crawl along the bottom like an amoeba.
C. are flagellated and able to swim.
D. bud off the adult sponge.
E. float out of the adult, fall to the bottom, and attach to form a new sponge.
C
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Which of the following is not an essential feature of electron transfer from water to NADP+?
A) photosystem II complex B) photosystem I complex C) coenzyme Q D) plastocyanin (PC) E) cytochrome b6/f complex
To produce a mutation in a specific E. coli gene, an engineered fragment of DNA in which sequences from each end of that gene flank an antibiotic resistance gene
A) is transformed into cells and replicates independently of the genomic DNA because it has a centromere. B) is transformed into cells and maintained as a plasmid. C) is introduced into cells and transposes into the bacterial gene. D) is introduced into cells and undergoes homologous recombination with the bacterial gene.
The first evidence of where the nerve cord will lie in the embryo is the
a. neural tube. b. chorionic villus. c. embryonic somite. d. primitive streak. e. neural plate.
Mitosis results in the formation of _____
Fill in the blank(s) with the appropriate word(s).