Pteridophytes are also known as: MCQ with Answer and Explanation

Explanation:
The fluid mosaic model, proposed by Singer and Nicolson in 1972, accurately describes the plasma membrane. The phospholipid bilayer has a fluid consistency, allowing lateral movement of lipids and proteins. Proteins float within or on this bilayer, forming a mosaic pattern. Thus, the reason correctly explains the assertion.

Explanation:
Genes are specific sequences of nucleotides that serve as the fundamental units of heredity, and in all cellular organisms, they are made of DNA (deoxyribonucleic acid). Chromosomes are thread-like structures composed of DNA and proteins, and they are located within the nucleus of eukaryotic cells. DNA is the genetic material in all cellular organisms; RNA serves as the genetic material only in some viruses, not in cells. 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.