The ecological role of nematodes includes:
a. population management of diatoms
b. being a scavenger.
c. being a key to benthic communities.
d. being numerous.
b
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Dad has a genotype of AaBb. He can produce sperm with how many different genotypes?
A. four B. two C. five D. three E. one
In shrublands
a. plants are adapted to episodes of fire. b. primary production is abundant throughout the year. c. there are constant cool temperatures throughout the year. d. winters are mild and summers are wet. e. precipitation occurs evenly year round.
The thick filaments of skeletal muscle ____
a. are composed of proteins with a double head and tail b. are composed of actin c. are attached to Z lines d. make up the light bands of the muscle e. are bead-like proteins
In an unstimulated neuron, the plasma membrane is most permeable to ________ ions
A) sodium (Na+) B) sugar C) calcium (Ca2+) D) potassium (K+) E) chloride (Cl?)