Answer: Annelida
Leeches are soft bodied segmented parasitic worms. They belong to the phylum Annelida. They are hermaphrodites which means they exhibit sex organs of both male and female.
The characteristics which are found in leeches which group them into Annelida are:
1. The body of the leeches are bilaterally symmetrical like other Annelids. The body organs are also segmented.
2. They have a closed circulatory system in which the heart pumps the blood to all the parts of the body.
3. Leeches either exhibit a protusible pharynx or proboscis which allows them to suck the blood of the host such features are also common in other Annelids.
Explanation:
in DNA nitrogen bases are adenine, thymine, guanine and cytosine and in RNA nitrogen bases are same but instead of the thymine there's uracil
in DNA there are linked together adenine and thymine ; Guanine and cytosine. And in RNA adenine and uracil; Guanine and cytosine.
DNA stores biological information in sequences of four bases of nucleic acid — adenine (A), thymine (T), cytosine (C) and guanine (G) — which are strung along ribbons of sugar-phosphate molecules in the shape of a double helix. ... Taken as a whole, this package of DNA serves as its owner's complete genetic blueprint. you going to find this in <span>https://www.nlm.nih.gov/visibleproofs/education/dna/dna.pdf
I Don't know about the second one </span>
Answer:
The polar nature of water make water universal solvent.
Explanation:
The polar nature of water is responsible for the versatility as a solvent because due to this polar nature of water maximum number of solutes or chemicals dissolved in it and it is also called universal solvent. Polar nature means making positive and negative polar which attracts the opposite charge atoms and making covalent bond with them. The hydrogen has partial positive charge so it attracts negative charge atom while oxygen has partial negative charge so it attracts positive charge atom.