Of the following choices, the best outgroup to use to resolve a phylogeny for great apes would be
a. lemurs.
b. butterflies.
c. angiosperms.
d. slime molds.
e. Archaea.
A
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A plant that has the mutant form of the WEREWOLF gene (wer) would be identifiable by
A. the lack of microscopic hairs along the epidermis of the root. B. the extra thick layer of mesophyll cells in the leaf. C. the abundance of microscopic hairs on the root. D. the excessive number of vascular bundles in stem. E. the lack of fibers in the outer portions of the stem.
Dibenzoylhydrazines are a category of molecules that have been used as insecticides. They work by blocking ecdysteroid receptors. How does this kill an insect?
A. The insect can no longer excrete nitrogenous wastes. B. The insect cannot molt. C. The chitinous exoskeleton is dissolved. D. The insect can no longer coordinate its movements.
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 apical side of the cell membrane only _____ What will be an ideal response?
Salinization is defined as _______________
A. the use of cover crops to manage excess salt B. the removal of salt from seawater C. the loss of biologically productive land to desert D. the effect of salt pollution from winter roadways E. the build up of salts in the topsoil