When an arborist prunes a limb off a valuable tree, he or she usually paints the cut surface. The primary purpose of the paint is to

#Question id: 16894

#Section 3: Mathematics and Quantitative Ecology

#Question id: 8290

#Section 2: Evolution

If, someday, an archaean cell is discovered whose rRNA sequence is more similar to that of humans than the sequence of mouse rRNA is to that of humans, the best explanation for this apparent discrepancy would be ________.

#Question id: 11931

#Section 2: Evolution

#Question id: 4569

#Section 2: Evolution

Which of the following must exist in a population before natural selection can act upon that population?

#Question id: 10163

#Section 5: Applied Ecology & Evolution

Some statements regarding C2, C3, C4 and CAM plants

a.) For Sucrose synthesis after C2 C3 and C4 cycle having different procedure

b.) C4  cycle reduces occurrence of C2 which is thermodynamically very expensive and toxic by increasing the assimilation of CO2 at high temperature almost at 35⁰ C

c.) C4 plant is generally found in near to equator  and they are more abundant than C3 plant

d.) In Dark when stomata are closed and CO2 not assimilated in the CAM plants

Which of the following statements from above combination is true?