Answer:
Hydrophobic part
Explanation:
A protein is made up of amino acids. Some amino acids such as serine and threonine are polar and hydrophilic in nature as they have polar side chains. The other amino acids such as alanine and proline are non-polar as they have nonpolar side chains.
The polar amino acids of a polypeptide chain are folded towards the inside of the protein to avoid any interaction with the surrounding watery medium. On the other hand, the polar and charged amino acids are oriented towards the surface of a folded protein. This arrangement makes the proteins stable.
1. Membrane, maybe a fence around your school or the walls as it is physical barrier between the cells internal environment and the outside.
2. Chloroplast, cafeteria, it generates food for the cell.
3. Rough endoplasmic reticulum, corridors, it transports proteins.
4. Lysosome, trash can, gets rid of old parts of the cell
Answer:
the diagram shows how the organisms are all relates andhow they have evolved over time. you read the cladogram left to right so you know that everything past the hagfish hasevolved with jaws.
Explanation:
The answer is <span>hy<span>pothalamus.</span></span>
<span>The hy<span>pothalamus <span>regulates the </span></span></span><span>sympathetic nervous system, part of </span><span> autonomic nervous system, </span><span>associated with fight-or-flight </span><span>responses.
During stress situations the sympathetic nervous system is more activated, causing a response of either run or fight. Because of that, the body needs to be prepared and there will be elevated blood pressure (the blood is going more to the skeletal muscle, heart,etc), dilated pupils (for better peripheral vision) and increased respiration. </span>
Natural selection is a specific mechanism of evolution in which the heritable traits help an organism to survive and reproduce successfully. answer B
