Answer:
The cell membrane is semi-permeable. It allows some molecules to enter easily inside the cell whereas some molecules are blocked from entering the cell.
Small, polar molecules and hydrophobic molecules enter easily through the cell membrane. But large molecules and ions cannot easily move inside the cell membrane.
A hydrophilic substance like the substance L mentioned in the question enters the cell membrane through the help of carrier proteins. The substance attached to the large protein might enter through active or passive diffusion but it can only enter the cell by attaching to carrier proteins.
All other cells in the body are called Somatic cells.
What are germ cells?
The founding cells of all sexually reproducing organisms are known as germ cells. They are separated from the embryo's other somatic cells during development. Germ cells grow at the edge of the embryo proper in many animals before moving through a number of developing somatic tissues on their way to the developing gonad.
What are somatic cells ?
Any cell in the body that is not a gamete (egg or sperm), a germ cell (cell that develops into a gamete), or a stem cell is referred to as a somatic cell. Somatic cells are essentially any cells that make up an organism's body and are not directly utilised to create a new creature during reproduction.
To learn more about gametes click on the link below:
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Answer:
A. Controls what goes into and out of the cell
Explanation:
If what you are referring to is the image attached, then the answer would be A. The structure that is labelled A is called the cell membrane.
The cell membrane is what we call semi-permeable. This means that some materials can go through them and others cannot without the help of other factors. The cell membrane encases the cell and protects the cell. It lets nutrients, minerals, and waste to move in and out of the cell.
Other choices:
B describes the cytoplasm.
C describes the nucleus
D describes the vacuole
Cells that protect the body by engulfing foreign cells or producing antibodies are D. White blood cells.
Answer:
your answer is C polymerase Chain Reaction PCR
