The main photosynthetic pigment used by plants is _____.
a) RuBP
b) chlorophyll a
c) NADPH
d) ATP
Ans: b) chlorophyll a
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What process best characterizes Ca2+ movement from the cytosol (low Ca2+ concentration) into the endoplasmic reticulum (high Ca2+ concentration)?
A. Calcium movement is spontaneous. B. Calcium movement involves active transport. C. Calcium movement occurs by facilitated diffusion using a transporter protein. D. Calcium movement does not require energy. E. Calcium movement occurs by passive diffusion.
If a living plant cell is placed in a beaker with a solution that has a ? value lower than the ? value of the plant cell, the
plant cell will ____.
a. take up water until it bursts b. lose water until its ? = ? of the solution c. take up water until within the cell ?P = ??S
d. take up water until its ? = ?S of the solution e. lose water until its ?S = its ?P
When a dorsal lip from a newt is attached to the ventral side of another embryo, it results in ____
a. two separate newts b. two attached newts c. survival of only the original newt d. death of the newt e. no observable result
Factors such as behavioral, temporal, or ecological isolation mechanisms that prevent two closely related sympatric populations from interbreeding can be grouped together and classified as ________
A) prezygotic isolating mechanisms B) postzygotic isolating mechanisms C) polyploidy hybrid speciation D) adaptive radiation