Answer:
Sun - Solar system - Local group - Milky way galaxy - Universe
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Answer:
Why are embryos used in medical research?
Stem cells can be obtained at the early stages of embryo development; these cells are called human embryonic stem cells (hESC). They also could be used in research to develop drugs to treat serious diseases, or to repair organs following a stroke or heart attack.
Answer:
Living organisms are not created spontaneously
Explanation:
All living organisms are made out of cells, cells are the basic unit of life, and cells come from preexisting cells
Mice that are injected with the living R strain survive.
