Mistletoe is a plant that grows in the branches of trees. Its roots penetrate the bark of the tree, allowing it to obtain water and nutrients. The tree is harmed, and can even die as a result of this interaction. This is an example of
A. commensalism.
B. herbivory.
C. parasitism.
D. predation.
E. mutualism.
C. parasitism.
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Lysosomes that lack mannose-6-phosphate receptors _____
A) receive "modified" enzymes and are thus unable to break down carbohydrates B) do not receive enzyme shipments from the Golgi apparatus C) have unstable membranes D) stick to transport vesicles and impede the transfer of enzymes
The fluorochrome method of staining Mycobacterium:
a. is less sensitive than the conventional carbolfuchsin stains. b. enables the smear to be initially examined at lower magnifications. c. results in a lower yield of positive smears. d. increases the amount of time needed for examining smears.
The process in which NH4+ is oxidized to NO3- is called ____
a. nitrification b. ammonification c. nitrogen cycling d. nitrogen fixation e. nitrogen assimilation
Which statement is true of polytomy branches?
a. Organisms in each branch share a common ancestor. b. Polytomy represent mass speciation from a single mutation event. c. The longest branch is the ancestor of the other sister taxa. d. Polytomy branching only occurs in single-celled organisms.