____ is not a component of a cellular membrane.
A. Cholesterol
B. Nucleic acid
C. Phospholipid
D. Protein
B. Nucleic acid
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Which of the following is NOT a characteristic of the gametophyte stage of the flowering plant?
A. haploid B. diploid C. gamete producing D. dependent of the sporophyte E. comprised usually only of 8 nuclei
The centromere
A. is a region of DNA where sister chromatids associate. B. is a group of proteins that attach to the kinetochore. C. is only present when chromosomes are highly compacted. D. is a group of proteins that attach to the mitotic spindle. E. is not present on the chromosomes of the daughter cells until anaphase.
Which of these traits distinguishes Holocephali from sharks and rays?
a. flattened bodies b. enlarged pectoral fins c. a lack of scales d. swim bladders
Which explanation is NOT a reason for why Hawaiian honeycreepers are vulnerable to extinction
a. reduction of their habitats b. frequent volcanic eruptions c. encroachment of humans into their habitats d. importation of new predators and competitors into their habitats e. warming of their habitats, supporting mosquitoes that carry avian malaria pathogens