In the female reproductive cycle, ovulation is triggered by a surge in: MCQ with Answer and Explanation

Explanation:
R.H. Whittaker's five kingdom classification places all prokaryotic organisms in Kingdom Monera and unicellular eukaryotes in Kingdom Protista. Fungi are a distinct kingdom characterized by heterotrophic nutrition, primarily saprophytic or parasitic, and possess chitinous cell walls. They are not photosynthetic autotrophs. Therefore, statements 1 and 2 are correct, while 3 is incorrect.

Explanation:
The resting membrane potential (-70 mV) is primarily established and maintained by the Na+/K+ ATPase pump, which actively transports 3 Na+ out and 2 K+ into the cell, creating an electrochemical gradient. Additionally, the membrane is much more permeable to K+ than to Na+ due to K+ leak channels. K+ diffuses out of the cell down its concentration gradient, leaving the inside negatively charged.

Explanation:
Parenchyma is a simple permanent tissue with thin-walled, living cells primarily involved in storage and photosynthesis. Collenchyma cells have thickened corners and provide mechanical support and flexibility to growing parts. Sclerenchyma consists of dead cells at maturity with heavily lignified walls, providing rigid strength. Thus, statements 1 and 2 are correct, but 3 is incorrect.