The answer is D. Global warming causes the ocean temperatures to rise and also its pH to decrease due to increased dissolved carbon dioxide in the waters. Due to the unfavorable temperatures and pH, the algae dissociate from the symbiotic relationship with coral polyps (as a survival mechanism) hence leaving the coral white (coral bleaching). The symbiotic relationship is key for the survival of the coral polyps hence most die following the dissociation. This upsets the reef ecosystem and affects all aquatic organisms that depend on the reef.
The crabs with white shells. The next generation of crabs will be white shelled.
Explanation:
The crabs with white shells are more likely to survive because they blend in with the white sand more than the ones with brown shells making it easier to hide from predators and also makes it a desired trait.
Animals do not possess any sort of cell wall since animals always move, they are not static in one particular place, therefore they need to be flexible.Animal cells lack the thick cell wall that plant cells have, so there is no need for a central vacuole to exert pressure on the surrounding cell
