(question). Molecules of trna and amino acids are assembled where?
Options:
- (A) nucleoli
- (B) A computer
- (C) Cooking
- (D) Most plants
- (E) boiling
- (F) animals
- (G) Power plants
- (H) retina
(answer). Molecules of tRNA bring amino acids to the ribosome in the correct sequence. Ribosomes are assembled in the nucleoli. Molecules of tRNA and amino acids are assembled in the nucleoli.
The answer is (A)


(question). Running water is better able to dissolve oxygen and nutrients than what?
Options:
- (A) pouring water
- (B) scarce resources
- (C) ocean water
- (D) river water
- (E) acetic acid
- (F) Veins and arteries.
- (G) an organism's body
- (H) stagnant water
(answer). Running water is better able to dissolve oxygen and nutrients than standing water. If the water stands still and becomes stagnant, it can become a breeding ground for mosquitoes. Running water is better able to dissolve oxygen and nutrients than stagnant water.
The answer is (H)


(question). The sun contributes what to ecosystems?
Options:
- (A) sun spot
- (B) energy
- (C) darkness
- (D) seeds
- (E) positive
- (F) photons
- (G) Nutrients
- (H) Energy.
(answer). Energy enters ecosystems in the form of sunlight or chemical compounds. If there is sun, there is sunlight, there is day. Energy enters ecosystems from the sun.
The answer is (B)


(question). What do plants respond to?
Options:
- (A) Chemical energy
- (B) Vibrations
- (C) heat energy
- (D) Sulfur dioxide
- (E) Temperature
- (F) sun's heat
- (G) Clouds
- (H) Wood
(answer).

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Plants respond to daily and seasonal cycles and to disease. Temperature follows a seasonal cycle. Plants respond to temperature.
The answer is (E)