Although most psychoactive substances interact with specific substances in the brain cells, the effects of are much more complex because several different neurotransmitter systems are affected. a. opiatesb. tranquilizersc. alcohold. marijuana

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.

Drag each tile to the correct location. match each trait that an organism displays to a reproductive strategy.

Tides that occur during the new and full moons