Suppose a friend says that we don't need to worry about the rising temperatures associated with global climate change. She claims that increased temperatures will make planktonic algae grow faster and that carbon dioxide (CO2) will be removed from the atmosphere faster. According to her, this carbon will be buried at the bottom of the ocean in calcium carbonate shells. As a result, the amount of carbon dioxide in the atmosphere will decrease and global warming will decline. Comment.

Video transcript

Hello, everyone. Here's the next question. Limestone deposits are formed by the sedimentation of remnants of dead bodies of marine organisms, which the following marine organisms are involved in the formation of limestone deposits. Well, limestone equals calcium carbonate. So any of these marine organisms that contain calcium carbonate in their bodies are involved in the formation of limestone deposits. So with that in mind, let's look through our answer choices noting that choice D. Says all of these. So there's the potential that all of them are correct. So let's look through these choices. Choice A says for Mnf Karen's um somebody just called forums. These are single celled protein East with shells and some of those shells contain calcium carbonate, let's say CC for short. So in that case those shells do become part of the deposits on the ocean floor that form limestone. So, since we have a potential all of these choice, I'm not going to select this is the answer, but I'm gonna market correct here. Choice B says red algae. Well, uh the calcium carbonate is present in the cell walls of some red algae. So obviously those red algae can also be involved in the formation of limestone. So, we'll say that that can be correct. And finally, choice. See coral animals, coral animals have shells made of calcium carbonate. So, also become part of limestone formation. So choice D all of these is our correct answer here, forums. Red algae and coral animals are all marine organisms involved in the formation of limestone deposits. See you in the next video