<span> a mode of natural </span>selection<span> in which an extreme phenotype is favored over other phenotypes, causing frequency to shift over time in the direction of that phenotype.</span>
Answer: The cell membrane is a bilayer of lipids composed mainly of lipids and proteins.
Explanation: A cell is the functional unit of life. A cell is usually surrounded by the cell membrane. A cell is composed of different organelles such as the nucleus, mitochondria, ribosome, each also surrounded by a membrane and these organelles are suspended in the fluidy part of the cell know as the cytoplasm.
A cell membrane is a thin lining that surrounds the cell and encloses the cytoplasm. It is made up of two layers of lipids in which proteins are embedded. Cell membranes allow the selective passage of materials into and out of the cell.
Answer:
External respiration is the exchange of gases with the external environment, and occurs in the alveoli of the lungs.
True!
Joints are held together by ligament. Which are strong elastic bands of connective tissue that allow bones to glide over one another and provide flexibility.
Ask a question. Question something that you want to experiment on. then, write a hypothesis. And it goes on from there.
