Answer: Chemical weathering does not occur in desert.
In desert two types of weathering occurs:
1. Physical weathering
2. Chemical weathering
Physical weathering involves the disintegration of rocks by physical or natural sources like wind and this process does not change the chemical composition of the disintegrated matter. In chemical weathering process, the disintegration of rocks will result in alteration or change in the chemical composition of disintegrated matter.
The therapy can find the damaged cancer cells and prevent it from reproducing, or even taking it off the gene so that none person from the next generations will suffer the same.
Genes B and C with 10% recombination frequency are closest to each other. Because recombination happens at random, the distance between genes that are farther from each other creates higher recombination frequency. A low recombination frequency of 10% means the genes are closest to each other. The short distance between the two genes allow fewer recombination to happen, thus the frequency is low.
The correct option is B.
The information from the olfactory cells has to reach the cortex before they are transferred to the thalamus. When an odor molecule binds to a receptor, it start an electrical signal, which travel from the sensory neuron to the olfactory bulb. The olfactory bulb relays the signal to the appropriate part of the brain for further processing.