The mass of a tree is primarily carbon. The carbon comes from<span> carbon dioxide used during photosynthesis. During photosynthesis, </span>plants<span> convert the sun's energy into chemical energy which is captured within the bonds of carbon molecules built from atmospheric carbon dioxide and water.</span>
Answer:
Option-II and III
Explanation:
The wastewater produced by humans like from the human toilets is dumped into the flowing river bodies mostly in rivers and in the lakes also.
The human wastewater is rich in the nutrient contents like the phosphorus, nitrogen, and potassium. These nutrients could be accumulated in the lakes which could cause eutrophication in the lakes and rivers.
Also, the human stool sump is rich in the disease-causing pathogens like the bacterial species present in the gut and intestine.
Thus, Option-II and III are correct.
Answer;
-Nucleotides
Explanation;
-Nucleic acids are polynucleotides, that is, long chainlike molecules composed of a series of nearly identical building blocks called nucleotides. Each nucleotide consists of a nitrogen-containing aromatic base attached to a pentose (five-carbon) sugar, which is in turn attached to a phosphate group.
-A sugar-phosphate backbone joins together nucleotides in a DNA sequence. The sugar-phosphate backbone forms the structural framework of nucleic acids, including DNA and RNA. This backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.
The answer is B. controlling the flow of blood to the skin
The answer is C, The population of an area decreases
