Question
What must happen before meiosis can begin
DNA replication must come first before meiosis to happen.Previous to replication, a germ cell contains two copies of each chromosome, a maternal copy. and a paternal copy.
Answer:
Explanation: ground water contamination is nearly
always the result of human activity. In
areas where population density is high and human
use of the land is intensive, ground water is especially vulnerable. Virtually any activity whereby
chemicals or wastes may be released to the environment, either intentionally or accidentally, has
the potential to pollute ground water. When
ground water becomes contaminated, it is difficult
and expensive to clean up.
To begin to address pollution prevention or remediation, we must understand how surface waters
and ground waters interrelate.
Water molecules ,some ions ,non polar compounds and glucose can pass through a cell membrane
The various parts of the brain are:
- subdural space
- third ventricle
- fourth ventricle
- lateral ventricle
- foramen of magendie
- pia matter
- corpus callosum
- straight sinus
- arachnoid villa
- foramen of monroe
- dura matter
- skull - the protective covering of the brain
- subarachnoid space
- cerebral aqueduct
- choroid plexus
- arachnoid
- cerebellum
- cerebrum
<h3>What are the various parts of the brain?</h3>
The brain is the most important organ found in the body. The brain controls all the other processes occurring in the body.
The brain consists of cells called neurons which are interconnected to each other and which receive information from other parts of the body, processes it and sends out response signals.
The various parts of the brain are as follows:
- subdural space
- third ventricle
- fourth ventricle
- lateral ventricle
- foramen of magendie
- pia matter
- corpus callosum
- straight sinus
- arachnoid villa
- foramen of monroe
- dura matter
- skull - the protective covering of the brain
- subarachnoid space
- cerebral aqueduct
- choroid plexus
- arachnoid
- cerebellum
- cerebrum
In conclusion, the various parts of the brain function to make the brain work efficiently.
Learn more about parts of the brain at: brainly.com/question/1247675
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