How do astronauts prevent muscle atrophy?
a. they sleep more.
b. they exercise
c. they sleep less
d. they eat alot

What molecules will be best used to compare different species with the exact same sequence of amino acids? why would two species have the same protein even if the molecules in question is different? (hint: transcription to translation to protein).

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes

The two tubes contain bromothymol blue. after 24 hours, what will the color of the water be in tube b? a. green (it won't change) b. yellow c. blue d. colorless (clear)