Transport proteins (carrier proteins and channel proteins) allow substances into and out of the cell that cannot pass through the phospholipid bilayer (as they’re either to large, charged or not lipid soluble) by facilitated diffusion.
Specifically channel proteins allow ions into and out of the cell by creating a pore in the membrane in which they can move through with their concentration gradient
The answer is stem cells, they consist of classes of cells
that are undifferentiated and are able to be classified them into types like
specialized cells. They consist of having two main sources that will help them
develop and mature, these main sources are called the embryonic stem cell and
the adult stem cell.
Apples are a fruit that is high in fiber, vitamin C and various antioxidants. It has vitamins and minerals.
Active:requires the assistance of a carrier protein, also requires energy
Passive:does not require energy is also movement of ions and other atomic and other molecular substances.
Answer: Correct options are A, C and D
A. a forest because it has more trees to provide plant litter
C. a forest because it has more animals to mix the soil
D. a forest because the trees prevent rain from reaching the soil
Explanation:
Humus simply refers to organic matter, and the quantity of organic matter in a habitat depends on the extent of life activities done there.
Deserts, unlike forests have minimal life activities (as few plants and animals thrive in it). Thus, forests have more humus than deserts.
