Answer: Crossing over
Explanation:
In meiosis, chromatids are made to exchange their genetic material during Prophase to allow the formation of offspring that are genetically different from their parents.
The process of exchange is called CROSSING OVER. And it occurs through a contact point known as Chiasma.
Answer:
<u>d. Transport proteins within the membrane serve as a tunnel for molecules to enter the cell.
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Explanation:
Solutes are typically moved across the cell through either passive or active transport. The cells, surrounded by a bilipid layer or plasma membrane is amphiphlic- its polar, hydrophilic lipid heads face outwards, while their non-polar hydrophobic lipid tails face inwards towards each other.
While lipid-soluble molecules move across the layer easily, it is also difficult for charged and also large molecules to move across its surface, into the cell. Transmembrane channels, <u>embedded within the membrane</u>, help to maintain selective permeability as transport proteins, pores and gated channels. Simple diffusion happens as a method of passive transport in cells through plasma membranes.
The solutes travel through the plasma membrane in the process of diffusion from regions of high concentration to regions of low concentration; this occurs without the use of energy. <u>Molecules moving against their concentration require active transport mechanism to cross the membrane</u>.
A is the answer. Hope that helped.
Answer:
This trend suggests that although the ESA does effectively protect habitat, it doesn't protect all parts of a species' range equally. Rather, the Endangered Species Act provides unique and more effective protection for habitat that happens to be on federal land.
Explanation:
