Answer:
. The cell membrane is a lipid bilayer that prevents that passage of water and ions. This allows cells to maintain a higher concentration of sodium ions out the outside of the cell.
Explanation:
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The long-necked giraffes can access more food, so they have a better chance of surviving to reproductive age.
Answer:
Metaphase (mitosis) and metaphase I ( Meiosis)
Explanation:
In a diploid organism, the chromosomes are present in pair called homologous pair which has to be distributed in the cells during the cell division cycle.
The distribution of the chromosomes in a cell is observed in four subphases: prophase, metaphase, anaphase and telophase.
The homologous chromosomes when are found in a condensed form and are present in the centre of the cell or at the equatorial plate is known as the metaphase.
In case of mitosis since the division takes place in one cycle, therefore, metaphase is the phase whereas in meiosis since the division takes place in two-cycle, therefore, metaphase I is correct as during the metaphase II the chromatids are present at the centre.
The purpose of the villi is to <span>increase the internal surface area of the </span>intestinal<span> walls making available a greater surface area for absorption, i will attach a picture of the villi for the structure part of this question </span>
Natural selection and macroevolution
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