Which of the following exert bottom-up control?

A. a parasite that resides in a mammal's gut
B. a tertiary predator with fluctuating population size
C. levels of calcium and nitrogen in the soil
D. a disease-carrying protist


C. levels of calcium and nitrogen in the soil

Biology & Microbiology

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Archaea differ from Bacteria in all of the following EXCEPT  

A.  cell wall composition. B.  plasma membrane make up. C.  DNA replication. D.  gene expression. E.  the presence of a nucleoid region.

Biology & Microbiology

Homologous chromosomes undergo recombination during ____

a. prophase II b. metaphase I c. metaphase II d. both prophase I and II e. prophase I

Biology & Microbiology

Which of the following plant nutrients is

mismatched with its function?

a. nitrogen--component of nucleic acids b. phosphorous--component of proteins c. sulfur--component of chlorophyll d. iron--enzyme cofactor e. all of these plant nutrients are matched correctly with their functions

Biology & Microbiology

The cells that carry electric signals from one part of the body to another in the nervous system are ________

A) dendrites B) neurons C) effectors D) synapses

Biology & Microbiology