Answer:
B cells and T cells are the white blood cells of the immune system that are responsible for adaptive immune response in an organism. Both the cells are made in the bone marrow.Explanation:
Answer:
C. Oxygen
Explanation:
Most, if not all living things use oxygen in some shape or form. While Helium is the most abundant element, it is asking for living things, in which oxygen is a vital building block in maintaining life. Without oxygen, most animal species and humans would die.
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We are talking about chemical reaction here. In a chemical reaction, substances that react are called reactants, and substances which are formed are called products. Atoms in the reactants break their bond, rearrange themselves and form new bonds to make the product. So no atoms are added or removed, which is called law of conservation of atoms/mass.
A nucleotide is a biomolecule made up of either DNA or RNA.
The answer is amino acid because an amino acid is the monomer of Protein, not for a nucleotide.
Answer:
Mitochondria, just like bacteria, contain circular DNA, while human cells have linear DNA. Some mitochondrial genes are also identical or similar to bacterial DNA genes.
Explanation:
Bacteria, mitochondria grow in size, duplicate their DNA and other structures, and then divide into two identical organelles.
