Which of the following do mycorrhizae, present for most plant species, generally NOT help roots with the uptake of?

a. water
b. nitrogen
c. phosphate
d. carbon


Ans: d. carbon

Biology & Microbiology

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In this figure showing SDS-PAGE of the progressive stages of glycine N-methyltransferase purification, the marker lane indicates that the purified protein:

A. has approximately 32,000 amino acids. B. has a molecular mass of approximately 32,000. C. has a positive charge and a molecular mass of approximately 32,000. D. has a negative charge and a molecular mass of approximately 32,000. E. is only present when cells are induced with glycine.

Biology & Microbiology

The three phylogenetic trees above all contain the same members, all have a common ancestor, but are divided up in three different ways. Which tree has members circled that are of several evolutionary lines and does not include the most recent common ancestor of the included lineages? What is this type of group is this?



A. Tree 3; polyphyletic.
B. Tree 2; polyphyletic.
C. Tree 1; monophyletic.
D. Tree 3; monophyletic.
E. Tree 2; paraphyletic.

Biology & Microbiology

Which type of joints are involved in opposition?

a. saddle b. planar c. ellipsoidal d. ball-and-socket

Biology & Microbiology

Parasitism is an intimate species interaction in which ______________

A. both species benefit B. both species are harmed C. one species benefits, and the other is harmed D. both species are unaffected E. one species benefits, and the other is neither harmed nor benefited

Biology & Microbiology