With chromosomes crossing over frequently, it's more likely that genetic defects will occur in offsprinfg.
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The living organisms in an ecosystem can be divided into three categories: producers, consumers and decomposers. They are all important parts of an ecosystem. Producers are the green plants. They make their own food.
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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.
Stress can cause a virus to switch from the lysogenic cycle to the lytic cycle.
