Answer: Older fossils usually are found in the deepest strata.
Explanation: The deeper the fossils are in the ground, the older that they are. The reason is because layers of dirt, sand, and rock cover the fossils, and because they have been around for millions of years, it would give it all the time to cover up the fossils.
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.
both species had growth in number within the same time period