They usually use ear tags
The right option is; food web
Food web best describes the diagram.
A food web describes feeding relationships by which energy and nutrients are transferred from one species of living organisms to another within an ecosystem. Food webs usually contain various food chains that are joined together. The food chains are illustrative diagrams that contain many arrows that point from one organism to another, indicating food energy flow from one feeding group of organisms (consumer) to another.
Answer:
1) Stem cells can renew themselves by dividing into more stem cells more than once.
2) There are two types of stem cells: adult and embryonic stem cells.
3) Stem cells are not specific to one area in the body and can turn into skin, bone, blood or brain cells.
Answer:
all direction,
the cytoplasm of the cell has lower concentration than the surrounding solution
The phospholipid bilayer is a non covalent aggregate; the lipids and the proteins molecules are held together chemical interactions such as vander waal's forces and hydrogen bond. The vander waals forces hold the hydrophobic tails together while the hydrogen bond helps to stabilize the lipid bi-layer structure.