Answer:
Complex organic food molecules such as sugars, fats, and proteins are rich sources of energy for cells because much of the energy used to form these molecules is literally stored within the chemical bonds that hold them together.
1. 25%
2. 75%
3. 1:2:1
Explanation:
electron, carbon, protein, mitochondria, neurons, mass of neuron, nervous system, brain, man
lichen
Common examples of pioneer species include bacteria, lichen, mosses, and fungi.
Answer: .D. Smaller because its smaller surface area to volume ratio would allow it to breathe sufficiently through its skin alone.
