Answer:
C. Cholesterol
Explanation:
Cholesterol maintains the fluidity of the cell membrane and thereby, regulates its function.
Bile acids are derived from cholesterol which serves as their precursor. For example, Taurocholic acid is a polar derivative of cholesterol. Bile acids serve in the absorption of fatty acids, glycerol, and fat-soluble vitamins as these compounds are non-polar in nature.
Vitamin D is produced when the derivative of cholesterol, 7-dehydrocholesterol undergoes photolysis in skin cells in presence of sunlight.
Answer: Option A
Explanation:
Birds attach the bur of the plant which helps in the pollination. The birds sit on the plant and the burs of the plant gets attached in the legs of the birds which is transferred from one place to another.
Seeds at a different place will help in reproduction and growth of the plants. In this case the birds are carrier of the burs.
This is how the birds help in the reproduction of the plants by becoming the messenger.
B. mitochondria and nucleus
Answer:En los metazoos, la autodefensa celular se sinergiza con todo el cuerpo ... contra diversos virus envueltos que incluyen influenza, coronavirus, lentivirus y flavivirus (5, 11). ... Muchos virus envueltos "brotan" de la membrana celular, y varios ... Aunque la función precisa de la mayoría de las galectinas sigue siendo
