Looking at the figure above, indicate the location of any sister taxa, outgroups, and polytomies in each of the trees (A, B, and C)
What will be an ideal response?
ANS:
Should include the placentals and marsupials as sister taxa in (A), the marsupials and monotremes as sister taxa in (B), reptiles as the outgroup to mammals in (A), and the polytomy at the tri-branch between the pla-centals, marsupials, and monotremes in (C).
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CAM plants keep stomata closed in the daytime, thus reducing loss of water. They can do this because they _____
A) fix CO2 into organic acids during the night B) fix CO2 into sugars in the bundle-sheath cells C) fix CO2 into pyruvate in the mesophyll cells D) use the enzyme phosphofructokinase, which outcompetes rubisco for CO2 E) use photosystem I and photosystem II at night
Which of the following functions is NOT performed by integral membrane proteins?
a. cell adhesion b. transport c. signal reception d. cell recognition e. cell reproduction
Sodium-potassium pumping moves ____ potassium ions into the cell for every ____ sodium ions that move out of the cell
a. two; two b. three; two c. two; three d. three; three e. three; four
Answer the following questions true (T) or false (F)
1. Cleavage includes the stage of development between the zygote and blastula. 2. The blastula is the stage of embryonic development in which cells migrate. 3. Gastrulation begins at the sea urchin blastula's vegetal pole.