Which tissue type is a sheet-like tissue with
one surface always facing a body cavity or an
external environment?
a. dense connective
b. muscular
c. epithelial
d. nervous
e. loose connective
C
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Consider the following excerpt of a figure from your text (Fig 31.9). Keep in mind that auxin
retains or loses a proton depending on its location in the plant stem. For each of the following statements, indicate (by placing a letter in the blank) whether after an auxin molecule has diffused into a cell it would then move a. away from the meristem b. toward the meristem c. have no movement in any direction PIN proteins are located on the lateral side of the cell membrane only _____ What will be an ideal response?
Which of the following would NOT be part of the germ tube?
A. tube cell nucleus B. two sperm cells C. pollen sporopollenin wall D. pectin precursors E. cell membrane
Amanatin, a toxin from the death cap poisonous mushroom, inhibits RNA polymerase, so it
A. stops initiation, elongation, and termination stages of transcription. B. reverses the direction of RNA polymerase action, tearing apart partially formed proteins. C. prevents the initiator tRNA from beginning translation. D. incorrectly places the release factor protein on mRNA and terminates translation. E. disables any introns from being produced, to complete the protein structures.
Which process occurs during photosynthesis?
A) The light reactions produce NADP from sunlight energy. B) Carbon dioxide reacts with 5-carbon molecules during the Calvin cycle. C) ATP is released at the end of the Calvin cycle. D) Water captures the electrons released from excited chlorophyll pigments.