The fossil Archaeopteryx provides evidence for the evolutionary link between: MCQ with Answer and Explanation

Explanation:
The spliceosome is a large, dynamic complex composed of five small nuclear ribonucleoproteins (snRNPs, pronounced 'snurps') and numerous other protein factors. It assembles on the pre-mRNA transcript in the nucleus. Its primary function is to catalyze the splicing of pre-mRNA: it precisely recognizes the splice sites at the boundaries of introns and exons, removes the non-coding intron sequences, and ligates (joins) the coding exons together to form a continuous, mature mRNA molecule that can be exported to the cytoplasm for translation.

Explanation:
The mucosal lining of the small intestine forms numerous finger-like projections called villi, which vastly increase the surface area for absorption of nutrients. Each villus contains a network of capillaries and a central lymphatic vessel (lacteal) for absorbing amino acids, sugars, and fats, respectively. Microvilli are further projections on the epithelial cells of the villi.

Explanation:
Melanin, produced by melanocytes, absorbs and dissipates UV radiation, protecting skin cells from DNA damage. Keratin is structural protein, collagen provides strength, elastin elasticity. Increased melanin production causes tanning.