Which combination of conditions would promote the most rapid diffusion across a cell membrane?
a. large molecule, high temperature, large concentration gradient
b. large molecule, low temperature, small concentration gradient
c. small molecule, low temperature, small concentration gradient
d. small molecule, high temperature, large concentration gradient
d
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The grouping "conidial fungi," also known as "imperfect fungi" or deuteromycetes, is a convenience grouping for
fungi that are not classified in other groups, because the conidial fungi ____.
a. have a dikaryotic phase in their life cycle b. are unicellular c. have no known sexual phase d. have a haploid phase in their life cycle e. lack a cell wall
The female gametophyte in flowering plants is the ____
a. ovary b. seed c. embryo sac d. megasporocyte e. ovule
Which amino acid always begins a polypeptide (protein) during translation?
A) valine B) phenylalanine C) methionine D) arginine
Which vein in the body carries oxygenated blood?
A) pulmonary vein B) inferior vena cava C) Veins never carry oxygenated blood. D) superior vena cava E) coronary vein