Basalt is the usually hard and black volcanic rock formed from (liquid) balsalitc lava
Coralline and calcareous algae build-ups are very essential for the development of coral reefs. In addition, when these coralline and calcareous algae tends to "stick" on landforms below the ocean surface, and as these life forms grows and continuously expands, they now form what we call "reefs."
Animals are associated with <u>phyla</u> and plants are associated with <u>divisions</u>
Answer: Option B
<u>Explanation:</u>
There are millions of organisms in the world. They were then subdivided based on the similarity between each groups.
The Animal kingdom range from complex to simple animals. The kingdom Animalia is further subdivided into Phyla. The phyla is further classified into vertebrates and invertebrates.
Plants acquire nutrition by photosynthesis. They are autotrophs preparing their own food. Animals can’t prepare their own food hence they directly or indirectly depend on the plants for food. The plant kingdom is subdivided to plant divisions.
Trisomy=3 chromosomes; 1 more than the required pair (2)
21=the type of chromosome
So, here we can eliminate A and B.
Now we have C and D.
I know that when sperm cell(s) simultaneously fertilize [an] egg, a class of identical twins will form. Therefore, we can eliminate D, leaving us with merely C. Henceforth, C is your final answer.
