Answer:
Iron from the sand.
Explanation:
Since some types of ocean life, (plankton, algae, etc.) do sometimes not get enough iron, (nutrient) in their bodies, sand is needed for their survival. Sand has lots of iron for the animals' health, so sand is vital for their health and survival.
Answer:
Explanation:
Most living things need food, water, light, temperatures within certain limits, and air. Living things have a variety of characteristics that are displayed to different degrees: they respire, move, respond to stimuli, reproduce and grow, and are dependent on their environment.
To solve this, you would need to identify the number of amino acids (20) you are dealing with and the number of positions (8) that are available in your polypeptide. so that would come out to 20 x 20 x 20 x 20 x 20 x 20 x 20 x 20 = 20^8