Th molecules in gas move around without pattern, they aren't stationary like in a solid or patterned like in a liquid.
Answer:
Explanation:
Preparation of competent cells -
Transformation
recovery
plating
The molecules in a solid object are packed together, meaning that they are closely together and can’t move freely
This statement is true. Early land animals indeed had gills as well as lungs. It is generally known that amphibians breathe through their skin, like how the lungs needed the skin for its respiratory. Fish have gills for breathing while mammals do have their nasal cavity and lungs for their gas exchange.
