Please if anyone could answer this question? Will mark brainliest!! Explain the process of gaseous exchange in the alveoli of the lungs.

Surrounded by microtubules, located near the nucleus. (don't try to google it) (give answer only if u know)

Explain why ecosystem diversity results in species diversity in a healthy biosphere

Which of the following statements is true regarding a basic amino acid? a.) the hydrophilic r group of a basic amino acid will be located on the interior of a protein b.) the positively charged r group of a basic amino acid could bind dna c.) the r group of a basic amino acid would only be able to form covalent bonds with other molecules d.) a basic amino acid would be considered both polar and hydrophobic e.) all of the above