The cell membrane controls the movement of substances in and out of cells and organelles. In this way, it is selectively permeable to ions and organic molecules.
The cell membrane maintains the cell's health by forming a barrier that controls which materials can enter or exit, changing shape when necessary, and enabling cell recognition.
The cell membrane, also known as the plasma membrane, plays a crucial role in maintaining the health of a cell. It serves as a barrier, separating the inside of the cell from its external environment and regulating which materials can enter or exit the cell. It is built from a phospholipid bilayer, with the hydrophobic internal lipid 'tails' and hydrophilic external phosphate 'heads'.
This cell membrane is selectively permeable, meaning it allows certain substances to pass through while keeping others out. It achieves this via different transport mechanisms, including passive (non-energy requiring) and active (energy-requiring), depending on the material. It's also flexible to allow changes in the cell's shape, particularly important in the case of red and white blood cells.
Another critical function is the handling of cell recognition. The outer surface of the membrane carries markers for this cause, essential in forming tissues and organs during development and later distinguishing 'self' from 'non-self' in the immune response.
#SPJ3
B. It must occur in abundance in nature or be easy to produce. C. It must be made up of elements that combine easily with oxygen. D. It must be in the solid state to be used.
D. It must be in the solid state to be used, is not a requirement of practical Fuel. I took the test and it was 100 percent correct, good luck
Answer:
In addition to vocalization, a mother sea lion locate her pup using a variety of behavioral signals such as moving inside their colony, returning to a familiar location within the colony where she frequented to feed her pup, visual cues and olfactory cues like smelling the approaching pups.
Explanation:
Sea Lions belong to the scientific order Pinnipedia and the family Otariidae. They can walk on all fours on land by rotating their pelvic girdle under their body and also use their front flippers to move in the water. During their breeding and pupping (birthing) time, they gather in groups called rookeries. They can communicate through vocalizations (barks, growls, and grunts) both on land and in water.
After the return of mother sea lions to the rookery from their searching for food (foraging), the mother-pup pairs identify and locate each other through the exchange of vocalizations. In addition to vocalization, the mothers often return to a home spot (familiar location within their colony where a female frequented to feed her pup), move inside the colony and also use visual and olfactory cues like smelling the approaching pups to correctly identify their pup. Also, the return of the mother to a familiar home spot provides the pup with spatial and geographical memory cues.
A.
two haploid cells
B.
four haploid cells
C.
two diploid cells
D.
four diploid cells
I think it's B.