The process by which atmospheric CO₂ is fixed into organic compounds by plants is: MCQ with Answer and Explanation

Explanation:
Bryophytes (mosses, liverworts, hornworts) are often called the 'amphibians of the plant kingdom' because, although they can live on land, they absolutely require water for the completion of their life cycle, specifically for the swimming of male gametes (antherozoids) to reach the female gamete (egg) during fertilization. Algae are mostly aquatic, while pteridophytes and gymnosperms are better adapted to terrestrial life.

Explanation:
Meiosis I is the reductional division where homologous chromosomes separate, resulting in two haploid cells with duplicated chromatids. Meiosis II is equational, separating sister chromatids. Mitosis maintains the diploid number. Meiosis ensures genetic variation and gamete formation.

Explanation:
Prokaryotes lack a true nucleus and nuclear membrane; their genetic material is concentrated in a nucleoid region. They possess ribosomes (70S), a plasma membrane, and usually a cell wall. The absence of membrane-bound organelles is a defining feature distinguishing them from eukaryotes. Thus, the nuclear membrane is absent.