All multicellular organisms begin as zygotes. Shortly after forming, a zygote begins to divide. The single-celled zygote divides to form two new cells, then four, then elght, and so on. The division of each of these cells to form two new cells is called cleavage. Before each cleavage, or cell division, the genetic material in each cellis duplicated. This enables a cell to pass on a complete set of genes to the new cells formed by cell division.
As you have read, the embryo develops In Its mother's uterus. It grows and becomes more complex until it is developed enough to leave the mother's body. The period from fertilization to birth, during which the offspring develops Inside the mother's body, is called pregnancy or the gestation perlod. In humans, the gestation period lasts about nine months. Pregnancy in humans is often discussed in terms of three three-month perlods called trimesters. Each trimester is characterized by specific changes in the developing offspring.
Are they describing "mitosis" or "melosis" In this paragraph? How can you tell?
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Biology, 21.06.2019 22:20
Which best compares habitat and niche? o niche is a place in which organisms live, and habitat is the way in which an organism fits into its habitat.o habitat is a place in which organisms live, and niche is the way in which an organism fits into its habitat.habitat is a group of organisms that live in an area, and niche is a specific species that lives in that areao niche is a group of organisms that live in an area, and habitat is a specific species that lives in that area.
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Biology, 21.06.2019 23:30
How many years would it take the atlantic ocean to grow 500 centimeters? show your work.
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Biology, 22.06.2019 06:30
What function does the limb sever in each animal? how are the limb bones of the four animals similar? based on these similarities what can be inferred about the evolution of the four animals.
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Biology, 22.06.2019 10:00
An animal cell (left) and a plant cell (right) are shown.which organelle, labeled x in the diagram, is found in both plant and animal cells?
Answers: 1
All multicellular organisms begin as zygotes. Shortly after forming, a zygote begins to divide. The...
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