A selectively permeable membrane is a membrane that allows only certain things into and out of the cell. so if the cell doesn't need or needs something it can allow or not allow it into the cell maintaining the balance of substances need for the cell to survive.
<span>During metaphase, the chromosomes lie up in the middle. Microtubules of the spindle attach to the centromere. After this, during anaphase, the chromosome break at the centromere, separate, and move to the opposite poles. So, your answer is C. </span>
Answer:
D, organisms that survive long enough to reproduce.
Explanation:
C and D are the best answers. Adaptations and skills other than speed and strength contribute to an organism's survival too, so that means it isn't C. Natural Selection is about how an organism must have useful traits to survive to reproductive stage and successfully reproduce, so it would definitely be D.
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Answer:
Atoms and molecules of gas move from areas of high density to areas of low density and from areas of high pressure to areas of low pressure. ... The warmer air at the equator is less dense than the cold air of the poles. Thus, the air from the poles tends to flow toward the equator (toward the area of lower density).
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Explanation:
<span>excessive abdominal fat, high LDL, low HDL</span>