Following are some facts regarding C3 and C4 Plants

a.) In C4 plants the reduction is caused by the additional energy requirements such as 1 ATP per CO2 from C3 plants

b.) C4 leaves are exposed to low O2 concentrations, the quantum yields for CO2 fixation remain constant while C3 leaves are exposed to low O2 concentrations quantum yield increases

c.) C3 leaves are exposed to low O2 concentrations, photorespiration is maximized

d.) Plant with the C4 metabolism need more rubisco than C3 plants to achieve a given rate of Photosynthesis

Which of the following combination would be correct?

#Question id: 4598

#Unit 11. Evolution and Behavior

Fossils of Thrinaxodon, a species that lived during the Triassic period, have been found in both South Africa and Antarctica. Thrinaxodon had a reptile-like skeleton and laid eggs, but small depressions on the front of its skull suggest it had whiskers and, therefore, fur. Thrinaxodon may have been warm-blooded. The fossils of Thrinaxodon are consistent with the hypothesis that ________.

#Question id: 4599

#Unit 11. Evolution and Behavior

Many crustaceans (for example, lobsters, shrimp, and crayfish) use their tails to swim, but crabs have reduced tails that curl under their shells and are not used in swimming. This is an example of ________.

#Question id: 4600

#Unit 11. Evolution and Behavior

Scientific theories ________.

#Question id: 4601

#Unit 11. Evolution and Behavior

DDT was once considered a "silver bullet" that would permanently eradicate insect pests. Instead, DDT is largely useless against many insects. Which of these would have prevented this evolution of DDT resistance in insect pests?

#Question id: 4602

#Unit 11. Evolution and Behavior

If the bacterium Staphylococcus aureus experiences a cost for maintaining one or more antibiotic-resistance genes, what would happen in environments that lack antibiotics?

#Question id: 4603

#Unit 11. Evolution and Behavior

Of the following anatomical structures, which is homologous to the bones in the wing of a bird?