The answer is “there is genetic variation within the population”
<span>The texture of the rock is a great example of the environment for igneous rocks. Many rocks of this type tend to have very jagged or rough textures, and are shown to come from environments that are high in heat, pressure, and also change greatly over short periods of time due to the many eruptions and lava flows that take place.</span>
Answer: wdym uh they keep the internal body environment within its normal range.
Explanation:
