The movement of water through the apoplast pathway does NOT cross which layer in the root?
A. Endodermis
B. Epidermis
C. Cortex
D. Pericycle
Answer: Option A
Solution (By JKSSB Mock Tests)
In the apoplast pathway, water moves through cell walls and intercellular spaces without crossing membranes. However, at the endodermis, the Casparian strip (suberin deposition) blocks apoplastic movement, forcing water to enter the symplast (via plasma membrane). Thus, apoplastic movement stops at the endodermis. This ensures selective uptake of minerals.
Explanation:
Double fertilization is a unique feature of angiosperms. One male gamete fuses with the egg cell to form the diploid zygote (syngamy), which develops into the embryo. The second male gamete fuses with the diploid secondary nucleus (polar nuclei) of the central cell to form the triploid Primary Endosperm Nucleus (PEN), which develops into the endosperm.
Explanation:
The left ventricle pumps blood into the aorta and to the systemic circulation. Its wall is the thickest because it must generate high pressure.
Explanation:
A mid-cycle surge in LH (luteinizing hormone) from the anterior pituitary triggers ovulation—the release of the secondary oocyte from the mature Graafian follicle. FSH stimulates follicle development. Estrogen levels rise before ovulation and provide positive feedback for the LH surge. Progesterone is secreted after ovulation by the corpus luteum.
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