At the onset of the embryonic period, the appear(s). it will eventually become the neural tube. stem cells spinal cord primitive streak placenta

answer; /// i believe that the correct answer is; ///a combination of the birth and death

the correct answer is b. possesses the characteristic of compartmentalization of organelles, wherein the organelles are bound by membranes.

explanation:

a. by using fur or clothes to trap heat energy near the body

producers: apple trees, potatoes, carrots, grains, acorns, cabbage, grass, corn, lettuce

consumers: deer, mice, rabbits, chickens, squirrels, horses, worms, cows

predators: eagles, frogs, wolves, owls