The correct answer is option B
The fishes that live in the shallow water along the sea floor needs a flattened shape and eyes on the dorsal side because they need to see above and have least possibility that the eyes will be required to see downwards as they lie at the sea floor.
They have tail for protection and flattened body for easy swimming.
Example: Stingray.
A concentration gradient because diffusion is from a higher concentration to lower concentration.
Answer:
Guanine always pairs with Cytosine. :)
Conduction
Convection
Radiation
Answer:
B. are at the beginning of every food chain in a
community
make the environment suitable for complex plants