The scientist who discovered the vaccine for rabies was: MCQ with Answer and Explanation

Explanation:
Carbon dioxide (CO₂) is the primary greenhouse gas, along with methane (CH₄), nitrous oxide (N₂O), water vapor, and CFCs. These trap heat in the atmosphere, leading to global warming and climate change. CO₂ levels have risen due to fossil fuel burning and deforestation. The greenhouse effect is natural and essential, but enhanced levels cause global temperature rise.

Explanation:
GMOs are organisms whose genetic material has been modified through recombinant DNA technology, introducing or deleting specific genes. Selective breeding and cross-pollination are traditional methods that do not directly manipulate DNA. Cloning produces genetically identical copies without necessarily altering the genome. Examples: Bt cotton, Golden rice.

Explanation:
Pinocytosis ('cell drinking') is a form of endocytosis where the cell membrane invaginates to take in a small droplet of extracellular fluid and dissolved solutes. Phagocytosis is 'cell eating' of large particles, exocytosis is secretion, osmosis is water movement across a semipermeable membrane.