Answer:
A phosphate backbone is the portion of the DNA double helix that provides structural support to the molecule. DNA consists of two strands that wind around each other like a twisted ladder. Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups. Attached to each sugar is one of four bases--adenine (A), cytosine (C), guanine (G), or thymine (T). The two strands are held together by bonds between the bases, with adenine forming a base pair with thymine, and cytosine forming a base pair with guanine.
C. the surface area becomes very large and the cell is flooded with nutrients.
Tusks are essentially overgrown teeth. Yet they’re typically used for most task of daily living; digging for water or vital minerals in the ground, debating trees to secure fibrous food, and helping males compete for females
Answer:
The correct answer is bone marrow and thymus
Explanation:
Primary lymphoid organs are bone marrow and thymus. Both organs consist of primary lymphoid tissue where B and T cells are produced.
Lymphocytes are also complete the early phases of maturation in the primary lymphatic organs in the body. In humans, B cells are generated and mature in the bone marrow. However, T cells are produced in the bone marrow and maturation takes place in the thymus.
Thus, the correct answer is the bone marrow and thymus gland.
Electron pairs , because the atoms become stable by gaining the electron pairs
