Which of the following is a cellular characteristic of ALL eukaryotes?
a) a nuclear membrane
b) a cell wall
c) a nucleoid
d) few to no organelles in the cytoplasm
e) few to no proteins associated with the DNA
Answer: a) a nuclear membrane
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Norton Zinder and Joshua Lederberg discovered transduction in experiments with ____
a. Escherichia coli b. Neurospora c. Aspergillus d. Salmonella typhimurium e. Streptococcus pneumoniae
Sea anemones have a(n) __________ that causes
them to extend into a feeding position when longitudinal cells __________ and radial cells __________. a. hydrostatic skeleton; contract; relax b. endoskeleton; contract; relax c. exoskeleton; contract; relax d. hydrostatic skeleton; relax; contract e. exoskeleton; relax; contract
Flowering plants reproduce through ________
A) asexual reproduction only B) sexual reproduction only C) asexual reproduction and sexual reproduction D) budding
The formation of the bivalent during meiosis
A. contributes to the genetic diversity of a species. B. ensures that the resulting haploid cells will have the same combination of homologous chromosomes as the original diploid cell. C. occurs during meiosis I and meiosis II. D. aids the alignment of sister chromatids in a single row along the metaphase plate. E. is required for the pairing of homologous chromosomes.