Acell with a 3.5% solute concentration is __ to a solution with 1.5% solute concentration.
a. hyoptonic
b. isotonic
c. hypertonic
d. saturated

Living cells cannot use heat to provide the activation energy for biochemical reactions because which choice(s) complete the sentence correctly? a) answer choice ii. eliminate b) answer choices ii and iv. c) answer choice iii and iv. d) all answers can complete the sentence.

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm

Number and variety of living organism; includes genetic, species, and ecological types