Euglenoids are placed in which kingdom of the five-kingdom classification? MCQ with Answer and Explanation

Explanation:
Smooth endoplasmic reticulum (SER) lacks ribosomes and synthesizes lipids, steroid hormones, and detoxifies drugs. Rough ER synthesizes proteins.

Explanation:
Epithelial tissues cover body surfaces and line cavities, providing protection. However, they are avascular (lack blood vessels) and receive nutrients by diffusion from underlying connective tissue. So R is false.

Explanation:
Seed dispersal spreads seeds away from the parent plant, reducing competition for light, water, nutrients, and space. It also aids in colonization of new habitats and increases species distribution. Dispersal agents include wind, water, animals, and explosive mechanisms. Overcrowding would lead to resource limitation. Genetic diversity is promoted by cross-pollination, not directly by dispersal.