Abscisic acid (ABA) is often called the 'stress hormone' because it: MCQ with Answer and Explanation

Explanation:
The inner surface of the small intestine is lined with finger-like projections called villi, which increase the surface area for absorption. The epithelial cells (enterocytes) covering these villi have their own microscopic, finger-like projections on their apical surface, called microvilli. Collectively, these microvilli form a 'brush border'. This further massively increases the surface area, maximizing the efficiency of nutrient absorption. Cilia are motile, and stereocilia are found in the inner ear and epididymis.

Explanation:
Zika virus is primarily transmitted by Aedes aegypti and Aedes albopictus mosquitoes. It can cause microcephaly in fetuses. Anopheles transmits malaria, Culex filariasis/West Nile.

Explanation:
A simple fruit develops from a single ovary of a single flower, which may be a single carpel or fused carpels (e.g., tomato, peach). Aggregate fruits develop from separate carpels of one flower (e.g., strawberry). Multiple fruits from many flowers (e.g., pineapple).