These stem cells come from embryos that are three to five days old. At this stage, an embryo is called a blastocyst and has about 150 cells. These are pluripotent (ploo-RIP-uh-tunt) stem cells, meaning they can divide into more stem cells or can become any type of cell in the body.
Answer:
Viruses are not cells at all, so they are neither prokaryotes nor eukaryotes. Viruses contain DNA but not much else. They lack the other parts shared by all cells, including a plasma membrane, cytoplasm, and ribosomes.
Explanation:
Microorganisms are too small for us to see directly, so we have to use a microscope to see them.
Answer: (B) Comet
Explanation: A comet that is not near the sun consists only of a nucleus <u>solid core of frozen water, frozen gases, and dust</u>.
Answer:
The answer would be C
Explanation:
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