Answer:
Both eukaryotes and prokaryotes have gene regulation strategies. By gene regulation, the amount of protein is maintained in the living cell.
In prokaryotes, operons are present which are controlled by a regulatory gene that regulates the synthesis of protein in prokaryotes. In eukaryotes, repressor and transcription activators regulate the expression of gene and protein formation.
So by gene regulation cell maintains the number of protein molecules to become too great for a cell. Without gene regulation the survival of any organism is not possible.
Answer: selective permeability.
The cell is said to be selectively permeable
Explanation:the cell membrane is the membrane that covers the living portion of the cell.the is the boundary between the cell and it's extracellular environment.
The cell membrane contains lipids ,proteins and carbonhydrate.the lipids forms a bilayer in which proteins are embedded.the bilayer allows some materials to move through the cell membrane more easily than others.thus the cell is said to be selectively permeable.
Small molecules such as oxygen gas, nitrogen gas ,which can dissolve in the lipids,can easily pass through.uncharged molecules can also pass through eg carbon dioxide.
Large polar molecules eg glucose,amino acids etc.can not easily pass through and they may need to be carried by transport proteins
Contraction and relaxation of muscles results in movement
Answer:
True
Explanation:
If ya want a explanation you can go to this Link Nasa made an article about it And no i am not a bot
https://climate.nasa.gov/faq/17/do-scientists-agree-on-climate-change/
Another Link from Quora:https://www.quora.com/Is-it-true-that-99-of-scientists-agree-that-the-climate-is-changing-because-of-human-actions