The disease caused by the deficiency of iodine is: MCQ with Answer and Explanation

Explanation:
DNA replication is semiconservative and uses DNA polymerase. In eukaryotes, it occurs in the nucleus, not cytoplasm. So statement 3 is incorrect.

Explanation:
Lichens are a mutualistic association between an alga (or cyanobacterium) and a fungus. The alga photosynthesizes, providing food; the fungus provides shelter, water, and minerals. Both benefit. Tapeworm is parasitism, barnacles on whales commensalism (or sometimes parasitism depending on effect), mosquito blood-sucking is parasitism.

Explanation:
Tuberculosis is a bacterial disease caused by Mycobacterium tuberculosis, primarily affecting the lungs. Polio is a viral disease caused by the poliovirus, attacking the nervous system. Tetanus is caused by the bacterium Clostridium tetani, which produces a neurotoxin that causes severe muscle spasms and affects the nervous system. Thus, only statement 3 is correct.