During prophase, the nuclear envelope surrounding the DNA starts to disappear and the DNA condenses into chromosomes<span>. The 46 </span>chromosomes each<span> consist of 2 identical sister chromatids. The centrioles move to opposite poles of the parent cell. The second step of </span>mitosis<span> is metaphase.</span>
The biceps relax and the triceps contract when raising the fore arm
Answer:
Many parts of the cardiovascular system (including the heart) are influenced by gravity. On Earth, for example, the veins in our legs work against gravity to get blood back to the heart. Without gravity, however, the heart and blood vessels change – and the longer the flight, the more severe the changes.
Mutualism is where both animal help each other to benefit form each other. Win-Win . Commensalism is where nothing happen neither animal benefits from it .
