The gland that secretes melatonin, regulating the sleep-wake cycle, is the: MCQ with Answer and Explanation

Explanation:
Southern blotting, named after its inventor Edwin Southern, is a laboratory method used to detect specific DNA sequences in a complex DNA sample. The process involves digesting DNA with restriction enzymes, separating the fragments by gel electrophoresis, transferring (blotting) them onto a nylon or nitrocellulose membrane, and then hybridizing the membrane with a labeled, complementary DNA or RNA probe. Northern blotting detects RNA, and Western blotting detects proteins.

Explanation:
Incomplete dominance is a form of inheritance where the phenotype of the heterozygote is a distinct intermediate blend of the phenotypes of the two homozygotes. Neither allele is completely dominant over the other. A classic example is the flower color in snapdragons (Antirrhinum), where a cross between a homozygous red (RR) and a homozygous white (rr) plant produces heterozygous pink (Rr) offspring. Codominance, in contrast, involves the full expression of both alleles simultaneously (e.g., AB blood type).

Explanation:
The vertebral column (spine) consists of vertebrae stacked to form a canal that encloses and protects the spinal cord. The skull protects the brain, rib cage the thoracic organs, pelvis the pelvic organs.