The scientist who proposed the 'germ plasm theory' to disprove Lamarckism was: MCQ with Answer and Explanation

Explanation:
In angiosperms, the pollen tube must enter the ovule to deliver the male gametes to the embryo sac. The most common and typical pathway is through the micropyle (the small opening at the tip of the integuments), which is called porogamy. In some plants (like Casuarina, Juglans), the pollen tube enters through the chalaza (the base of the nucellus), which is called chalazogamy. Entry through the integuments is called mesogamy. Apogamy is the formation of a sporophyte without fertilization.

Explanation:
Kwashiorkor results from severe protein deficiency with adequate calories, causing edema, pot belly, and skin lesions. Marasmus is overall calorie deficiency, beriberi thiamine.

Explanation:
During intense exercise, when oxygen supply is insufficient, muscle cells switch to anaerobic glycolysis, producing ATP and lactic acid from glucose. Lactic acid accumulation lowers pH, causing muscle fatigue, soreness, and cramps. It is later converted back to glucose in the liver (Cori cycle). Ethanol is produced by yeast fermentation.