Consider statements about evolution: 1. Natural selection was proposed by Darwin. 2. Evolution always leads to perfect organisms. 3. Homologous organs indicate common ancestry. Which are correct? MCQ with Answer and Explanation

Explanation:
The domesticated silkworm, Bombyx mori, is a monophagous insect, meaning it feeds almost exclusively on the fresh leaves of the mulberry plant (primarily Morus alba). The quality and quantity of silk produced are directly dependent on the quality of the mulberry leaves consumed by the larvae. While tasar silkworms feed on oak and castor, the common mulberry silkworm requires Morus alba.

Explanation:
Gene therapy is an experimental technique that involves introducing genes into a patient's cells to correct or compensate for genetic defects causing disease. Transgenic animals have had their genome deliberately altered by the insertion of foreign DNA from another species. Biopesticides, derived from natural materials like bacteria, plants, or minerals, are generally target-specific and non-toxic to humans and the environment, unlike synthetic chemical pesticides. Thus, statements 1 and 2 are correct.

Explanation:
Apis mellifera (the Italian or European honeybee) is widely preferred in commercial apiculture over the indigenous Apis cerana indica because it has a significantly higher honey collection capacity, yields more honey per hive, has a higher reproduction rate, and tends to stay in the hive for longer periods without swarming (absconding). While it can be more aggressive, its superior productivity makes it the choice for commercial beekeeping.