Amphibia is the class of vertebrates which is considered to be the first to develop lungs. This allowed amphibians to live successfully on land as terrestrial organisms. Ichthyostega was the first primitive amphibians with nostrils and lungs. Amphibians adopted themselves to live on land with developed lungs.
1. formaldehyde
2. paradichlorobenzene
3. tobacco smoke
4. toronto smog
5. pesticides
Answer:Antibiotics disrupt essential processes or structures in the bacterial cell. This either kills the bacterium or slows down bacterial growth. Depending on these effects an antibiotic is said to be bactericidal or bacteriostatic.
The answer for this is carbohydrates.
Answer:
11) A. The optimum pH of an enzyme is 6.6
12) C. A control group
