The study of fungi is known as: MCQ with Answer and Explanation

Explanation:
Bacillus thuringiensis (Bt) is a bacterium producing crystal (Cry) proteins toxic to specific insect larvae, used as a biological insecticide. DDT, malathion, and lindane are synthetic chemical pesticides. Biopesticides are eco-friendly, target-specific, and biodegradable. Bt formulations are used in organic farming. The cry gene is also used in GM crops like Bt cotton.

Explanation:
The blood-brain barrier (BBB) is formed by tight junctions between endothelial cells of brain capillaries, restricting the passage of pathogens and large molecules. Meninges cover the brain, choroid plexus makes CSF, corpus callosum connects hemispheres.

Explanation:
During metaphase, chromosomes are maximally condensed and attach to spindle fibers at the kinetochores, aligning at the metaphase plate.