Most of the aquatic macroinvertebrates in a stream are

(a) clams.
(b) insect larvae.
(c) worms.
(d) arthropods such as crayfish.


(a) clams.

Biology & Microbiology

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Many different structures make up a cell and have unique functions. Each cell structure is associated with a critical function in the cell. These pairings include

_____ microfilaments; cytoskeleton. _____ lysosomes; protein synthesis. _____ nucleus; DNA replication. _____cell membrane; barrier between the cell and the external environment _____ Golgi apparatus; modification, processing, and sorting of macromolecules.

Biology & Microbiology

Which of the following is the fundamental mechanism that supports all forms of respiration?

a. osmosis b. kinetic energy c. diffusion d. momentum

Biology & Microbiology

The chloroplasts of modern plants are thought to have been derived according to which sequence?

A) cyanobacteria ? green algae ? green plants B) cyanobacteria ? green algae ? fungi ? green plants C) red algae ? brown algae ? green algae ? green plants D) red algae ? cyanobacteria ? green plants E) cyanobacteria ? red algae ? green algae ? green plants

Biology & Microbiology

If nondisjunction occurs during meiosis I,

a. the resulting sex cells are heterogametes. b. one-half of the resulting cells are n + 1, and the other half are n – 1. c. diploid cells are produced. d. all gametes will lack a chromosome and be infertile. e. only one half the gametes are affected.

Biology & Microbiology