Which of the following are NOT found in any
prokaryotic cell?
a. ribosomes
b. membrane-bound organelles
c. polysaccharide capsules
d. cell walls
e. flagella
Answer: b
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Select the statements that provide direct biogeographical evidence for evolutionary theory. Check all that apply.
_____ Unrelated organisms from similar habitats exhibit similar characters. _____ Terrestrial mammals are not found naturally on any island greater than 300 miles from a mainland. _____ Organisms on islands are most similar to organisms on the nearby mainland, even when habitats on the mainland and island are quite different. _____ Invasive rats have colonized more than 80% of the world's islands.
Put the following events of elongation in prokaryotic translation in chronological order
1. Binding of mRNA with small ribosomal subunit 2. Recognition of initiation codon 3. Complementary base pairing between initiator codon and anticodon of initiator tRNA 4. Base pairing of the mRNA codon following the initiator codon with its complementary tRNA 5. Attachment of the large subunit A) 1, 2, 3, 4, 5 B) 2, 1, 4, 3, 5 C) 5, 4, 3, 2, 1 D) 1, 2, 3, 5, 4
Which observation(s) of the medium ground finch (Geospiza fortis) by Peter and Rosemary Grant verify Darwin's selection hypothesis? Check all that apply.
A. Offspring were similar to parents in beak size and shape. B. Considerable variation existed in the beak size and shape of this finch. C. Beak shape (depth) varied with the dryness of the year. D. The medium ground finch showed assortative mating according to beak size and shape.
Chlorosis is a plant condition referring to the:
A. localized death of tissues B. yellowing of leaves C. stunted growth of stems and leaves D. development of tumors E. healing of wounds