. Which of the following is one of the four major biological macromolecule classes?

a. proteases
b. hydrophilic G-proteins
c. nucleic acids
d. amorphous solids


c. nucleic acids

Biology & Microbiology

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Freshwater flatworms have a _______ system that is primarily important in osmoregulation, so you would expect the urine in these tubules to have an osmolarity ____ the osmolarity of the body fluids.

A. protonephridial, lower than B. protonephridial, higher than C. metanephridial, lower than D. metanephridial, higher than E. protonephridial, similar to

Biology & Microbiology

The serotinous cones of the longleaf pine, Pinus palustris, depend on _____ to release their seeds.

A. daylight B. extended freezes C. sustained rainfall D. fire E. animals

Biology & Microbiology

Radiolarians have vacuoles, which provide them with buoyancy in marine environments

Indicate whether the statement is true or false.

Biology & Microbiology

The last place that pressure or sound waves pass

through in hearing is the a. middle ear. b. tympanic membrane. c. oval window. d. round window. e. tectorial membrane.

Biology & Microbiology