All living things need to have cells before they are said to be living. this is because the cell is the basic unit of life.
Answer:
The Last Universal Common Ancestor (LUCA) is the most recent common ancestor of all current life on Earth, estimated to have lived some 3.5 to 3.8 billion years ago
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Explanation:
B) Density (keyword dense) is used to describe something thicker or more filled with. If you make a ball smaller aka decrease its mass and make it thicker aka volume It would make it a lot denser than before
<span>In general mutations often occur during nuclear division because each chromosome has to replicate before division (mitosis). During replication your 3 billion nucleotides make copies of themselves leaving one copy in the original cell and another in the sister cell after division. This as you can imagine makes mutations most likely to occur here.
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Crossing over is the <span>mechanism of genetic variation results from the exchange of gene segments between non-sister chromatids.</span>
