Which extant chordates are postulated to be most like the earliest chordates in appearance?
A) lancelets
B) adult tunicates
C) amphibians
D) chondrichthyans
A
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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
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
Many antibiotics kill bacteria because they hinder translation by prokaryotic ________.
A. cytoskeleton B. ribosomes C. nucleoids D. cytoplasm E. capsules
Contraceptive implants prevent ovulation by releasing progesterone
Indicate whether the statement is true or false