The answer for this question would be choice <span>B) Water, rock, and surface materials, or the second option.</span>
The main function of cholesterol in our brain is that it initiates information synthesis and it also involved in excretion of glands. In addition, it signals the central nervous system when a new memory or knowledge is acquired although if it exceeds would cause mental disorders like Alzheimer's.
The statement above is TRUE.
RNA hydrolysis is a reaction in which a phosphodiester bond in the sugar phosphate backbone of RNA is broken, thus cleaving the RNA molecule.
This reaction is made possible in RNA because the ribose sugar in RNA has hydroxyl group at the two prime position.
The first land animals had to adapt to this whole new set of conditions that were significantly different than the ones in the water.
One of the biggest challenges was to protect the embryo in these new harsh conditions. The amphibians and members of earlier lineages such as fish are dependent on water for their reproduction, but reptiles, birds, and mammals have developed the amniotic egg during the course of their evolutionary history enabling them to produce offspringing on the ground.
Members of this group either carry their offspring inside the female's womb or lay eggs that are protected with an outer tough layer. Both the young in the womb and the ones inside an egg are protected but the embryonic membranes amnion and chorion that contain water and nutrients necessary for the development of the embryo and therefore are called amniotes.