Some species of ants "farm" aphids by protecting them from predators. In return, the ants feed on a sugar-rich liquid (called honeydew) secreted by the aphids. The ecological relationship between the ants and the aphids is:
A. mutualism.
B. parasitism.
C. competition.
D. None of answers is correct.
A
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Based on the number of species, the most successful extant phylum of plants is the
A. Anthophyta. B. Coniferophyta. C. Pterophyta. D. Gnetophyta. E. Charophyta. F. Hepaticophyta.
You are attempting to determine which step of prokaryotic translation a new antibiotic inhibits. You have determined that the antibiotic interacts with a translational factor but need to identify which one
If the new antibiotic interferes with elongation, which of the following factors could be a potential site of action? A) IF3 interaction with an aminoacyl tRNA B) EF-Tu placement of N-formylmethionine onto the ribosome C) EF-Tu interaction with an aminoacyl tRNA D) EF-Ts translocation of tRNAs from the A site to the P site E) All of these could be potential sites of action.
Aquatic biomes are defined primarily by ________
A) the animals that live there B) the plants that live there C) their temperature D) their salinity
The major source of electrons for tumor-infiltrated T cells is
a) Glucose b) PEP c) PEP carboxykinase d) Oxygen