MCQ
The mutations which prove fatal for the organism are called:
- ASpontaneous
- BInduced
- CDeleterious
- DLethal
Explanation:
(1) Spontaneous mutations are the mutations that occur naturally (may arise from error in DNA replication or Spontaneous Deamination of 5-Methyl-cytosine)
(2) Induced mutations are the mutations that occurs due to external environmental causes or mutagens (such X-rays or UV radiations).
(3) Deleterious mutation is a genetic alteration that increases an individual's susceptibility or predisposition to a certain disease or disorder.
(4) Lethal mutation causes the death of an organism carrying the mutated genome.
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| Column $- I$ | Column $- II$ |
| (a) Saprophyte | (i) Symbiotic association of fungi with plant roots |
| (b) Parasite | (ii) Decomposition of dead organic materials |
| (c) Lichens | (iii) Living on living plants or animals |
| (d) Mycorrhiza | (iv) Symbiotic association of algae and fungi |
Choose the correct answer from the options given below
$(a)\quad (b)\quad (c)\quad (d)$