The process of
prenatal development occurs in three main stages and they are listed in order;
<span>1. </span>Germinal Stage - begins at conception when the
sperm and egg cell joined in one of the two fallopian tubes.
<span>2. </span>Embryonic Stage - begins at the beginning of
the third week after conception. This stage plays an important role in the
development of the brain.
<span>3. </span>Fetal Stage - begins during the ninth week
and lasts until birth.
This solar energy conversion process is known as photosynthesis. ... At this time, the oxygen level was approximately 10% of its present atmospheric concentration. ... The presence of ozone enabled organisms to develop and live on the land.
Answer:
Mammary glands, milk production, More complex brain
Explanation:
Just did it
Paleontologists have found fossil evidence of various “walking whales,” semiaquatic whales that show some early stages of the transition from land-dwelling ancestors to today’s familiar fully marine whales. One such “walking whale” is Ambulocetus (am-bew-lo-SEAT-us ...
It helps in protecting against sedimenting particles
