Rhinoceros unicornis is the binomial name of the Indian one-horned rhinoceros. Panthera uncia is the snow leopard, Elephas maximus the Asian elephant, Gavialis gangeticus the gharial. The genus Rhinoceros and species unicornis reflect its single horn. Binomial nomenclature ensures universal scientific recognition.
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The tracheal wall contains C-shaped hyaline cartilage rings that keep the airway open, preventing collapse due to negative pressure during inspiration. Smooth muscle and fibrous tissue connect the rings, ciliated epithelium sweeps mucus upward.
Explanation:
Glyoxysomes are specialized peroxisomes found in the fat-storing cotyledons of germinating seeds. They contain enzymes for the beta-oxidation of fatty acids and the glyoxylate cycle, which converts stored lipids into carbohydrates (gluconeogenesis) to nourish the growing seedling. This metabolic pathway is absent in animal cells. Exam tip: Glyoxysomes eventually transform into chloroplasts as the plant matures.
Explanation:
Human somatic cells have 46 chromosomes: 44 autosomes and 2 sex chromosomes (XX or XY). Sperm cells are haploid (n=23), containing 22 autosomes and one sex chromosome (either X or Y). The ovum also has 22 autosomes and one X. Fertilization restores 44 autosomes plus XX or XY. So sperm has 22 autosomes.
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