Asap! algae are microscopic plants that grow in the ocean. algae must have sunlight, nutrients, and water to survive. what are these conditions called? a. uncontrolled factors b. limiting factors c. necessary factors d. non-living factors

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

Hemoglobin is a proton that carries oxygen around the body what is hemoglobin made from

Asap many people try to eliminate fat from their diets which is one reason it is necessary for humans to eat fat a) fat is the only way to get energy b) every cell in the body must contain fat c)fat stores less energy than polysaccharides d) saturated fats make blood vessels healthier