You didn't really provide any possible answers here. However, it's very easy to say that the responsible actors for impulse transmission across the synapses from one nervous cell to another nervous cell is what we call neurotransmitters. These are special molecules that can have different effects when binding onto the required receptor sites.
Answer: Lipids
Explanation: The ratio of saturated and unsaturated fatty acids (lipids) determines the fluidity in the membrane at cold temperature.
Heterozygous genotype= 2pq
2(.7*.3)= .42
ANSWER = .42
D) Deciduous forests have coniferous trees and thrive in cold water
