Letters because it resprent unknown things
A phospholipid is an amphipathic molecule, meaning it has a hydrophobic part and a hydrophilic part. The fatty acid chains are hydrophobic and do not interact with water, whereas the phosphate-containing group is hydrophilic (because of its charge) and interacts readily with water.
<span>The plan of the sponges suggests that, if animals did arise from colonial protists, that they can and will evolve into animals again in the future. Since protists are grouped in a colony and combine to make one organism, there is a possibility of endless capabilities out there for different and new animals that could potentially become a realization.</span>
Answer: Option B.
Neural crest and peripheral nervous system.
Explanation:
Neural crest are bilateral paired cells of the neural tube that arise from the ectoderm layer of the embryo. Thesescells move to different part of the body and differentiate into various cell types like melanocytes,cartilage and bone, smooth muscle, craniofacial, neurons, gangalia e.t.c. The neural crest running through neural tube develop into peripheral nervous system after birth. Peripheral nervous system consist of neurons and gangalia outside the nervous system The peripheral nervous system connect the central nervous system to organs, skin and limbs.
Well, since its about it needing to survive and reproduce in a specific environment, it should be fitness.