Answer:
- transport nutrients into the cell that cannot otherwise cross the phospholipid bilayer
- transport wastes out of the cell that cannot otherwise cross the cell membrane
Explanation:
Cell membrane integral proteins especially trans-membrane proteins facilitate and regulate the movement of particular molecules across the cell membrane. Examples of these molecules are glucose and sodium ions. These molecules are either charged and cannot pass through the hydrophobic lipid layer of the cell membrane and/or are too large to pass through the cell membrane pores (like the aquaporins).Other types of cell membrane proteins are peripheral proteins. Collectively these proteins can have several other functions include cell signaling, enzymatic activity, cell-to-cell recognition , and etcetera.
Answer:
At heart, all life on Earth uses a membrane that separates the organism from its environment. ... In this regard, water is essential simply because it's a liquid at Earth-like temperatures. Because it flows, water provides an efficient way to transfer substances from a cell to the cell's environment.
On Earth, we all know gravity affects everything around us. ... There's no gravity to pull blood into the lower part of the body. Instead, blood goes to the chest and head, causing astronauts to have puffy faces and bulging blood vessels in their necks.
A. cuz it adds genetic diversity
Parents can pass on chromosomes to their children that are different than their own when the new gene combinations are created by crossing over.
The exchange of genetic material between homologous chromosomes is known as crossing over which occurs in meiosis.
