Answer:
Mutation
Explanation:
The main cause of variation within a population is usually through genetic mutation.
Mutation is the alteration of the genetic sequence within an organism. It often lead to formation of new genetic patterns and codes.
Most times, environmental influences are paramount to causing genetic mutation within a population.
Other times, it might be due to competition and some other internal factors.
Mutation can be transferred from parents to offspring in most cases.
<span>The question said,'Emma extracted some fresh orange juice and mixed it with some water. The result was a cloudy yellow colour solution. When poured through a filter, tiny bits of orange were filtered out. What type of mixture did Emma prepare. The correct option is 'suspension'. This is because, suspension is defined as a heterogenous solution in which the solid particle can not dissolve in the solution but can only be removed by filteration. Colloid is wrong because, it can not be filtered as it is homogenous in nature.</span>
Answer: When a blood vessel contracts for a short period of time.This constriction can contract small vessels completely and avoid the flow of blood through them.
Explanation:
Because the membrane is made of lipids, typically fat-soluble (non-polar) molecules are able to pass easily. In addition, smaller, uncharged polar molecules can also pass through. Use the attached diagram to help you understand.
