Which extant chordates are postulated to be most like the earliest chordates in appearance?

A) lancelets
B) adult tunicates
C) amphibians
D) chondrichthyans


A

Biology & Microbiology

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Seed packets give a recommended planting depth for the enclosed seeds. The most likely reason some seeds are to be covered with only -inch of soil is that the _____

A) seedlings do not produce a hypocotyl B) seedlings do not have an etiolation response C) seeds require light to germinate D) seeds require a higher temperature to germinate E) seeds are very sensitive to waterlogging

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Which of the following is most likely to have a small protein called ubiquitin attached to it?

A) a cyclin protein, that usually acts in G1, in a cell that is in G2 B) a cell surface protein that requires transport from the ER C) an mRNA leaving the nucleus to be translated D) a regulatory protein that requires sugar residues to function properly E) an mRNA produced by an egg cell that will be retained until after fertilization

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Many antibiotics kill bacteria because they hinder translation by prokaryotic ________.

A. cytoskeleton B. ribosomes C. nucleoids D. cytoplasm E. capsules

Biology & Microbiology

Contraceptive implants prevent ovulation by releasing progesterone

Indicate whether the statement is true or false

Biology & Microbiology