In the XX-XY system of sex determination, the male is: MCQ with Answer and Explanation

Explanation:
Prokaryotes lack membrane-bound organelles like mitochondria, Golgi apparatus, and endoplasmic reticulum. They have 70S ribosomes, a single circular chromosome in a nucleoid, and typically a cell wall (except Mycoplasma). Eukaryotes possess membrane-bound organelles. This fundamental difference defines the two major cell types in the living world.

Explanation:
Anabaena azollae lives in cavities of the water fern Azolla and fixes atmospheric nitrogen. It is used as a biofertilizer in rice paddies.

Explanation:
Poultry farming involves the commercial rearing of birds, primarily chickens, for the production of meat (broilers) and eggs (layers). Dairy farming focuses on the breeding, rearing, and management of cattle, buffaloes, and other mammals for the production of milk and milk products. Sericulture is the rearing of silkworms (Bombyx mori) for silk production; the rearing of honeybees is called apiculture. Thus, statements 1 and 2 are correct.