Answer: A stroke occurs when the blood supply to part of the brain is suddenly interrupted or when a blood vessel in the brain bursts, spilling blood into the spaces surrounding brain cells. Brain cells die when they no longer receive oxygen and nutrients from the blood or there is sudden bleeding into or around the brain.
Explanation: Mark me Brain and 5 star ratings and a thank you
Answer:
<em>The correct option is C) happened by chance</em>
Explanation:
Mutations can be described as any changes which occur in the DNA of an organism. Mutations can be natural or induced through methods like the use of chemicals.
Mutations occur randomly and happen by chance. Hence, option C is correct.
Other options like option A are false because mutation is the sudden change in the genome of an organism. Hence, mutations will not cause the teeth to grow longer until they reach an optimal length.
Children under 12 may not register as a donor in the Donor Register, nor may anyone else do this on their behalf. Doctors may only use the organs or tissue of a deceased child if they have obtained consent from the child’s parents or carers.
Young people aged 12 to 15 can register as an organ donor. However, the parents or carers have the legal authority to override their child’s wishes on organ donation, even when this is registered, until the child turns 16.
Young people not listed on the Register are automatically sent a donor form after their 18th birthday. The government hopes this will encourage more people to become organ donors.
The Corpus Callosum is what joins the two hemispheres of the brain.Hope that helps .
