The biome characterized by permafrost and low biodiversity, dominated by mosses and lichens, is: MCQ with Answer and Explanation

Explanation:
Klinefelter syndrome is a sex chromosomal aneuploidy in males characterized by the karyotype 47, XXY. Individuals are phenotypically male but often exhibit feminine characteristics such as gynecomastia (development of breasts), sparse body hair, and are typically sterile due to underdeveloped testes. Down syndrome is trisomy 21 (47, +21), Turner syndrome is 45, X0, and Patau syndrome is trisomy 13.

Explanation:
In the biogeochemical carbon cycle, carbon dioxide (CO2) is removed from the atmosphere primarily by autotrophs (plants, algae) through the process of photosynthesis, where it is fixed into organic compounds (glucose). Carbon is returned to the atmosphere through respiration (by plants and animals), decomposition of dead organic matter, and combustion of fossil fuels.

Explanation:
Smooth endoplasmic reticulum (SER) contains enzymes like cytochrome P450 that detoxify lipid-soluble drugs, metabolic wastes, and poisons by making them water-soluble for excretion. It is abundant in hepatocytes (liver cells). Rough ER synthesizes proteins, lysosomes digest cellular material, Golgi packages. SER also synthesizes lipids and steroids.