Which of the following would be the latest in the development of a human fetus? Bone starts to replace cartilage to form the beginnings of a skeleton.
The fetus grows to reach approximately eight centimeters in length.
Cells divide into the endoderm, mesoderm, and ectoderm.
The nervous system begins to develop and can control basic body functions.
(free point)

Fossils can only be formed when? if mud, silt or tar is in the area to preserve the fossil ierosion does not occur and allows the fossil to form oxygen and microorganisms cannot decay the bones the area is dry and does not contain mud or silt

Nucleic acid certain protein cell membranes certain carbohydrates

Johnny rode his bike 4 blicks down the street to his friend's house once he got to his friend house and realized he could not cone out to play he turned aroubd and went back home. what is displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point