Cellulase hydrolyzes cellulose into glucose. It is produced by certain bacteria, fungi, and protozoa, enabling them to digest plant material. Herbivores harbor these microbes in their gut. Humans lack cellulase.
Explanation:
Testosterone, produced by Leydig cells in the testes, promotes development of male characteristics like facial hair, deepening of voice, and muscle growth. It also regulates spermatogenesis.
Explanation:
Chiasmata become clearly visible during the diplotene stage of Prophase I. While the actual exchange of genetic material (crossing over) occurs during the pachytene stage, the homologous chromosomes begin to repel each other and move apart in diplotene, remaining connected only at the sites of crossing over, which appear as X-shaped chiasmata. Exam tip: Pachytene = crossing over; Diplotene = chiasmata visible.
Explanation:
Iron is the central atom of heme in hemoglobin, essential for binding oxygen. Magnesium is in chlorophyll, calcium in bones and signaling, phosphorus in ATP and bones.
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