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The process of
The Correct Answer is {"dropdown-group-1":"A","dropdown-group-2":"A"}
A. Oogenesis: Produces 1 mature ovum. During oogenesis the unequal cytokinesis of meiotic divisions creates one large functional ovum and smaller polar bodies.
B. Meiosis: Meiosis is the cell-division mechanism that reduces chromosome number. In spermatogenesis meiosis yields 4 functional sperm, but in oogenesis meiosis (with unequal cytokinesis) yields 1 functional ovum plus polar bodies.
C. Spermatogenesis: Spermatogenesis produces 4 mature sperm from one spermatogonial cell (not ova) -it does not produce mature ova.
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Correct Answer is A
Explanation
A. Follicle Stimulating Hormone (FSH):FSH directly stimulates Sertoli cells in the testes to support sperm development and the process of spermatogenesis .
B. Luteinizing Hormone (LH):LH stimulates Leydig cells to produce testosterone, which indirectly supports spermatogenesis, but LH itself is not the primary regulator of the spermatogenic process.
C. Estrogen:Estrogen is present in males in small amounts (via aromatization of androgens) and has modulatory roles, but it is not the main hormone regulating spermatogenesis.
D. Progesterone:Progesterone has little to no direct role in regulating spermatogenesis in males.
Correct Answer is B
Explanation
A. Diffusion of gas does not depend on the partial pressure gradient: Incorrect -gas diffusion across membranes depends on partial pressure gradients (and membrane properties).
B. Gas diffuses from high partial pressure to low partial pressure: Correct -diffusion follows the partial pressure gradient (for example O₂ moves from alveoli where PO₂ is higher into blood where PO₂ is lower).
C. Gas diffuses from low partial pressure to high partial pressure: Incorrect -that direction would require active transport; gases passively diffuse down their gradients.
D. Equilibrium can be reached without partial pressure gradient: Incorrect -equilibrium is reached when partial pressures equalize; without a gradient diffusion won’t proceed.
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