Answer:
A. two shark populations utilize the same fish population as their main food source
I'm guessing this is from Marine Biology. I know this is an example of competition because two different groups of sharks are eating food from the same source. If one group gets to it first every time, they could leave the other group with no food. So it is a competition.
The answer is the physical changes that occur in the body as sexual development is stimulated by hormonal changes. The hormonal signals are produced by the brain to the gonads: the ovaries in a girl, the testes in a boy. In response, the gonads produce hormones that stimulate libido and the growth, and the respective physical characteristics associated with either sex.
This is an example of co-evolution.
<u>Explanation:</u>
In co-evolution one species or a number of species evolve according to the changes in another species. Here the evolution of the beak of humming bird according to the shape of Ossifloramixta flower is an example of co-evolution. Co-evolution is common in the nature.
Bees, insects and butterflies commonly co evolve with the flower plants and vice versa. Co-evolution is of two types. The first type is specific co – evolution where only two parties are involved in co-evolution. In the second type of co-evolution namely diffused co-evolution many species evolve in response to specific traits in a species.
<span>The best describes the first reaction the neuron has is </span>Ions flow into the neuron.
When a neuron sense a stimulus, it will open ion canal and allow ion to flow into neuron causing a change in membrane potential. This will activate a cascade of reaction which needed to sent message to other neurons.
Everything in Earth's system can be placed into one of four major subsystems: land, water, living things, or air. These four subsystems are called "spheres." Specifically, they are the "lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air) .
