The structure of RNA differs fundamentally from that of DNA in three ways:<span>It forms a single strand sugar-phosphate chain.
The sugar in its nucleotides is ribose.
<span>The base thymine is replaced by the base uracil.
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DNA is made of chemical building blocks called nucleotides<span>. These building blocks are made of three parts: a </span>phosphate<span> group, a sugar group and one of four types of nitrogen bases. To form a strand of DNA, </span>nucleotides<span> are linked into chains, with the </span>phosphate<span> and sugar groups alternating.
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Each RNA nucleotide consists of three parts: a sugar, a phosphate<span> group, and a</span>nitrogen<span>-containing base. The four RNA bases are </span>adenine<span>, </span>uracil, guanine, andcytosine<span>—often referred to as A, U, G, and C. RNA shares three bases in common with </span>DNA<span>: </span>adenine<span>, guanine, and </span>cytosine<span>. Instead of </span>uracil<span>, </span>DNA<span> contains</span>thymine<span>.</span>
it is caused by relaxation of smooth muscle cells that are in the vessel walls which in the large arteries.
1. D
2. B
3. E
4. C
5. A
Liver recieves nutrients from the digestive tract using the hepatic portal vein system, which are further absorbed and supplied to the body.
Small intestines consist of micro hair-like structures, the villi and microvilli that aid in nutrients absorption by increasing the surface area.
Stomach is the only digestive organs with multiple layers of muscles that breaks down large pieces of food into smaller chunks.
Pancreas serves the function of secreting different enzymes (amylases, lactase, galactosidase) that can digest carbohydrates, lipids, and proteins depending on the source of food you have eaten at that given moment.
Large intestines houses some good bacteria, our normal micro flora that further breakdown and digest food that might have passed. These freindly bacteria also act as source of vitamin B and K.
Answer:
A:
Explanation:
Select the correct answer.
Which statement is true about the male reproductive system?