The structure that conducts nerve impulses away from the cell body is the: MCQ with Answer and Explanation

Explanation:
Viruses are non-living outside a host cell and cannot carry out metabolism or reproduce independently. They hijack the host cell's machinery to replicate. Hence they are obligate intracellular parasites. The reason correctly explains the assertion. Even though some debate exists on whether viruses are living, the statement that they are obligate parasites and lack metabolic machinery is accurate.

Explanation:
Synapsis (pairing of homologous chromosomes) and crossing over (exchange of genetic material) occur during prophase I of meiosis, not in mitosis. Mitosis involves one division producing two genetically identical diploid daughter cells. Meiosis involves two divisions producing four haploid gametes with genetic variation. Chromosome duplication and sister chromatid separation occur in both. Spindle fibres form in both divisions. Thus, synapsis and crossing over are unique to meiosis.

Explanation:
Osteomalacia is the softening of bones in adults due to vitamin D deficiency, leading to inadequate mineralization of bone matrix. In children, the equivalent is rickets. Vitamin D aids calcium absorption. Deficiency may result from poor dietary intake, lack of sunlight, or malabsorption. Bones become weak and prone to fractures.