Answer:
The law of conservation of momentum states that the total momentum of interacting objects does not change.
This means the total momentum before a collision or explosion is equal to the total momentum after a collision or explosion.
Explanation:
The law of conservation of momentum is derived from Newton's third law of motion which states that action and reaction are equal and opposite.
The law of conservation of momentum can be stated as follows.
For a collision occurring between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision.
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I think the correct answer from the choices listed above is option A. When crossing-over takes place, chromosomes exchange corresponding segments of DNA. Corresponding genes on non-sister chromatids are exchanged at chiasmata. Hope this answers the question.
The spinal cord contains ascending and descending nerve fibres that send information between the CNS and the periphery. This illustrates the conduction function of the spinal cord.
The bony components of the vertebral column serve to shield the spinal cord, which is a component of the central nervous system (CNS) and which spans from the head to the tail of the body. It is protected by the three membranes that make up the central nervous system, which are the pia mater, the arachnoid, and the dura mater.
The spinal cord contains the descending and ascending nerve fibres. The spinal cord is an important component of both the central nervous system and the peripheral nervous system. It is connected to the rest of the nervous system by a network of 31 pairs of spinal nerves, which are responsible for carrying sensory information. These nerves go up the spinal cord or through the medulla oblongata to reach the subcortical nuclei, where they form synaptic connections.
Learn more about the spinal cord here:
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An endergonic reaction, like photosynthesis, refers to a reaction, which needs the energy to be driven. The activation energy for the reaction is usually greater in comparison to the entire energy of the exergonic reaction. The endergonic reactions are non-spontaneous.
In the given case, in order to accomplish the process, the coupling of the endergonic reaction, that is, thermodynamically unstable reaction with an exergonic, that is, the thermodynamically stable reaction is done so that the entire free-energy change of the coupled reactions becomes negative.
