Correct answer: True
The coral reefs are made up of thousands of tiny animals called as polyps. These are related to anemones and jellyfish. It possesses a sac-like a body and an opening which is encircled by the stinging tentacles called as cnidae.
They use calcium and carbonate ions which are derived from the seawater to in order to make a hard, cup-shaped skeleton. It protects the soft and delicate body of the polyp.
Hence, the correct answer would be true
I believe the answer is UNAIDS. hope this helps!
Answer: Phylogenetic trees are similar to the dichotomous keys because they used for identification and are artificial.
Answer: One of the characteristics used to place organisms into kingdoms is their ability to make food. Other characteristics used are the cell structure that is whether prokaryote or eukaryote, absence or presence of cell wall, presence or absence of other organelles, cellularity may also be used such as whether unicellular or multicellular, and lastly the mode of nutrition such as whether heterotrophs or autotrophs, e.t.c