Which of the following is a non-biodegradable pollutant? MCQ with Answer and Explanation

Explanation:
Ascariasis is caused by the large roundworm Ascaris lumbricoides, which is the most common human helminth infection globally. Infection occurs through the ingestion of embryonated eggs from contaminated soil, food, or water. The worms reside in the small intestine and can cause malnutrition, intestinal blockage, and other complications.

Explanation:
Genetic variation within a population provides the raw material upon which evolutionary forces act; without variation, evolution cannot occur. Natural selection acts directly on the phenotype (observable traits) of an organism, determining its survival and reproductive success. However, evolution is a population-level phenomenon; it involves changes in allele frequencies over generations, not changes occurring within a single individual's lifetime. Thus, statements 1 and 2 are correct.

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