I think you forgot to give the options along with the question. I am answering the question based on my knowledge and research. Tropical plant fossils found on islands in the Arctic ocean <span>helped prove the theory of Pangaea. I hope that this is the answer that has actually come to your desired help.</span>
Answer:
The DNA (deoxyribonucleic acid) is a double stranded molecule function as a genetic material in many organisms. It is comparatively stable molecule than RNA because of hydrogen bonds found in it and also due to lack of an oxygen atom. It's basic unit is nucleotide which comprises of a nitrogenous base, ribose sugar and a phosphate group. There are four type of nitrogenous bases found in DNA known as Purines (guanine +adenine) and pyrimidines (cytosine + thymines). As the name indicates the purines are double ringed while pyrimidines are single ringed.
This question is based on the concepts of watson and crick model of DNA. According to which base form bonds with their complementary bases like adenine form double hydrogen bond with thymine and cytosine form triple hydrogen bond with thymine.
Hydrogen bonding is function of hydrogen in which it form bond with atoms of higher electronegativity (ability to attract the bonding pair) like oxygen.
Answer:
A. mitosis
Explanation:
a type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth.
An ecosystem is a community of living organisms such as plants,animals,and microorganisms.
A population is a group of the same species that lives in the same habitat.
I hope I’m not saying this wrong,but multiple populations of different species form a big community.
Chloroplasts - found only in plants and algae. they convert solar radiation energy to chemical energy usable for the cell's metabolism.
mitochondria - found in both plants and animals, they produce energy (in the form of ATP - chemical compound) by decomposing sugars and fats. they use up oxygen to do it.