The answer is prophase of meiosis I.
Meiosis is a reducing cell division during which the number of chromosomes is reduced by half in the daughter cells. It consists of meiosis I and meiosis II. Major gene reshuffling takes place during meiosis I. This exchange of genetic material between homologous chromosomes is known as the crossover. Homologous chromosomes are present only in the meiosis I. They pair up during prophase of meiosis I. When they are paired up during prophase I, it is obviously that gene reshuffling takes place during prophase I.
Answer:
Graptolites lived from the Cambrian Period, about 510 million years ago, disappearing in the Carboniferous Period, around 320 million years ago.
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Answer:
The neuro cognitive disorder of blood flow to the brain is called as dementia.
Explanation:
When mental function decreases due to mental diseases,the term is called dementia in medical terminology.
There are several causes of dementia are-
- Brain injury which is caused by trauma.
- Intra cerebral hemorrhage,blood clot in the brain
- Breathing problem like hypoxia.
- Cardiovascular problems like TIA, Stroke,heart infection etc.
- Alzheimer disease,Huntington disease,HIV,any injury in brain.
- Pick disease etc
