True or false
a cell that undergoes either mitosis or meiosis must first replicate it 's DNA.

Both (But choose True!)

Explanation:

When cells undergo mitosis, they go through a phase called interphase. This replicates their DNA. In meiosis, the same thing happens, but only to meiosis 1. In meiosis 2, DNA isn't replicated.

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•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation:

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.