Following the completion of meiosis in animals, males produce ____ sperm cell(s) and females produce ____ egg(s)
a. 4 diploid; one diploid
b. 4 haploid; one haploid
c. 2 diploid; 4 haploid
d. 4 haploid; 2 diploid
e. 4 haploid; 3 haploid
ANSWER: b
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DNA transposable elements (DNA TEs) are:
A. a class of transposable elements that replicate and transpose via DNA replication and repair. B. a class of transposable elements that uses RNA as an intermediate. C. a class of transposable elements that uses DNA as an intermediate. D. a class of transposable elements that uses protein as an intermediate. E. a class of transposable elements that uses ribosomes as an intermediate.
How do protostomes differ from deuterostomes?
a. Protostomes are diploblastic. b. Protostomes have radial symmetry. c. The first opening that develops in protostomes is the anus. d. Protostomes undergo spiral cleavage during development. e. Protostomes undergo indeterminate cleavage during development
Whole genome or shotgun sequencing requires
A) the creation of a cDNA library. B) the creation of overlapping DNA fragments whose sequences can be aligned into large contiguous fragments (contigs) using computer algorithms. C) large contiguous fragments (contigs) cloned into yeast artificial chromosomes (YACs) in an ordered fashion. D) very large amounts of DNA from the organism whose genome is being sequenced. E) the use of a gene gun to propel DNA-coated particles at high velocities into cells.
You are examining a bacterial smear on a light microscope. You observe pinkish-red bacilli and blue cells of various shapes. You are probably looking at a smear prepared with the ________ stain
A) Gram B) Ziehl-Neelsen acid-fast C) Schaffer-Fulton endospore D) Gomori methenamine E) Hematoxylin and eosin