During performance of small bowel follow through, the contrast must reach the ILEOCECAL VALVE before performing compression views under fluoroscopy. Small bowel follow through involves the radiographing of the alimentary canal. It is usually performed using four basic steps.
Answer:
The correct answer will be-pachytene, prophase I,
Explanation:
Tetrad is the structure formed during the meiotic type of cell division which produces four daughter cells.
The tetrad structure is seen under the microscope during the pachytene substage of prophase I.
The tetrad structure is formed when four sister chromatids are aligned together in a cell before the crossing over event or recombination has to take place. The tetrad formation allows the crossing over to take place in pachytene.
Thus, pachytene, prophase I is the correct answer.
So basically in Prophase 1 you will get a synapsis (pairing) between homologous chromosomes. Followed by this you have what is called the crossing over stage, this is where different sections of the chromosomes are exchanged.
When it comes to cytokinesis in meiosis II, you will have four genetically unique haploid cells, that will have a random combination/mixture of the parental and maternal genes
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Answer: <u>Air would rise and move towards the poles </u>hope this helps you out :) Please let me know if you have any more questions
Natural selection is what caused them to change
