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(a) Name two vestigial structures in human beings.
(b) Why are some bacteria able to resist the effect of antibiotics.

Answer Text:
a)- Caecum
- Nictating membrane
- Appendix
- Tail
- Human body hair
- Ear muscle
b)- They have gene for resistance which is acquired through mutation. When bacteria are exposed to antibiotics for some time, they become
used or adapted to living in presence of the drug. The gene is passed to the offspring therefore establishing a population of drug resistant.