Answer:
<em>yellow to red is an acidic solution
</em>
<em>blue to violet is bases
</em>
<em>green color is a solution is neutral</em>
Explanation:
Active transport because it is moving from a lower concentration to a higher concentration
Answer:
Porifera—gastrovascular cavity, coelomate.
Explanation:
Sponges do not contain digestive system but obtain nutrients through the diffusion process. Porifera is the most commonly asymmetrical in nature but can also have radial symmetry. Porifera has no coelom.
Lacking a true digestive system, they depend on the intracellular digestive processes of their choanocytes for their energy intake. Gas exchange, circulation, and excretion occur by diffusion between the water and the cells.
Answer: It's known as the continental drift :)
Explanation: "Pangea's existence was first proposed in 1912 by German meteorologist Alfred Wegener as a part of his theory of continental drift. Its name is derived from the Greek pangaia, meaning “all the Earth.”" (copied from google)
The reasons are many. The most major reason was the fact that they were outnumbered by the U.S.
