The area marked by A in the figure is the cerebral cortex/cerebral mantle.
<h3><u>Explanation:</u></h3>
The cerebral cortex is known as the surface of the brain. It is the outer layer of the cerebrum dividing it into two hemispheres. There a numerous peaks and grooves in this layer called as gyri and sulci.
The cerebral cortex is the largest point of neural intergration in the central nervous system. It is essential for the actions like "attention, perception, awareness, thought, memory, language, and consciousness".
1.) Trace Fossil: Any indirect evidence left by an organism.
2.) Molds and Casts: An impression of an organism.
3.) Replacement: original material of an organism; replaces with minerals that can leave detailed replicas of hard or soft parts.
4.) Petrified or Per-mineralized: empty pore spaces are filled by minerals such as wood.
5.) Amber: preserved tree sap traps an entire organism.
6.) Original Material: mummification or freezing preserves original organism.
Hope this helps :)
Im assuming this is the question:
You have been studying a large lake ecosystem. You learn that toxins have been dumped into the water. You predict that the population with the highest concentration of the toxin would be the
ducks
zooplankton
algae
predatory birds
small fish
The answer to that question is predatory fish. In contaminated areas, bottom-dwelling fish are especially likely to have high levels of these chemicals because these substances settle to the bottom where the fish feed.
Here's an article to help in case:
https://www.doh.wa.gov/CommunityandEnvironment/Food/Fish/ContaminantsinFish
Adenine to thymine and cytosine to guanine are the base pairings during DNA replication.