Answer:
1) Nitrogenous bases
2) Nucleotides
3) Purines
4) Pyrimidines
Explanation:
1) Each one is made up of a pentose , a group, and one of four Nitrogenous bases
2) Adenine, guanine, cytosine and thymine are Nucleotides
3. Adenine and guanine, which have a nine-member double-ring, are called Purines
4. Cytosine and thymine, which have a six-member single-ring, are called Pyrimidines
Viroids are small single stranded RNA molecules and are found in plants only. Hope this helps.
Answer:
20
Explanation:
The ecosystem is made of tropic levels that starts from producers and ends on consumers. The producers get the maximum energy from the sun and then transfer only 10% of the total energy to the next tropic levels.
If snake receives 200 calories of the energy from eating a rabbit, then 10% of 200 = 20, would be passed down to the hawk.
