<span>The rock that was found is limestone.
Limestone is a sedimentary rock that is created by marine organisms. When the organisms die, their bodies settle to the bottom of the ocean or sea, decompose, and all that's left is their skeletons. Those skeletons then compact over time until they're formed into limestone. It's mostly composed of calcium carbonate which does react with acids to produce carbon dioxide and water. The presence of limestone indicates that the area used to be under water. The presence of the fossils in the gray rock indicates that it is limestone instead of marble which is a metamorphic rock made from limestone that's been subjected to great heat and pressure. If the rock were marble, then there would be no fossils still in it.</span>
Answer:
C.
Explanation:
In an ecosystem you have all the factors that contribute to a population of a variety of organisms. You have wind, water or sun as some abiotic factors which in turn help plants and trees survive with sustain different species.
Answer:
In case of both DNA and RNA, in general it is the nucleotides.
Nucleotides basically consists of three parts. The sugar(deoxyribose in DNA and ribose in RNA, both of which are pentose sugars), nitrogenous base and a phosphoric acid group.
The only component that varies in the nitrogenous base. There are five different types.
1.Adenine(A)
2.Guanine(G)
3.Cytosine(C)
4.Thymine(T)
5.Uracil(U)
1 and 2 are known as purines.
3, 4 and 5 are known as pyrimidines.
In DNA, A base pairs with T by means of a double hydrogen bond and G pairs with C by means of a triple hydrogen bond.
In RNA, A base pairs with U by means of a double hydrogen bond and G pairs with C by means of a triple hydrogen bond.
I would say the answer would be D.
Because: If a river is dammed then there is little to no flow going downstream. This will effect the life downstream and also change its conditions.
I Hope This Helped!
