Water, H2O. Hydrogen atoms can each form one covalent bond, while oxygen atoms can each form two covalent bonds. Two pairs of electrons are shared in a water molecule (H2O).
Answer:
1:to allow movement of small molecules in and out of cell
2
Answer: few animals can undergo both.
<span>The
correct answer is pharyngeal pouches.</span>
<span>All
chordates for at least some period of their life have pharyngeal pouches (pharyngeal
slits). Those are the openings in the pharynx with the function in the
filter-feeding. Pharyngeal slits are present during the embryonic stages of
tetrapod development. They <span>develop into gill arches (bony fish) and into the jaw and inner ear (terrestrial
animals).</span></span>
Answer:
true
Explanation:
glucose is the primary nutrient for all living things
