<span>This animal should be classified in PROTOSOME. In protosomes, the mouth is developed from the blastophores. This category includes Annelidia, Mollusca, Athropoda etc. They have a spiral cleavage pattern, and their mesoderm arises from the mesentoblast</span>
<span>Answer:The blood vessels in the brain are blocked.
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Vascular neurocognitive disorder
is a condition caused by reduction or blockage of the brain’s blood supply. Because of the lack of blood, a certain region of the brain was damaged, changing a person’s
brain functions.
Human papillomavirus (HPV), low socioeconomic level, smoking, marriage before the age of 18 years, young age at first coitus, several sexual partners, multiple sexual partners of spouse, and multiple childbirths are all established risk factors for developing cervical cancer. Because of hormonal changes or a compromised immune system, pregnant women may be more exposed to HPV infection or cancer.
Age may also play a role: Women who have their first child before the age of 20 are at a higher risk of cancer than those who wait until after the age of 25. Even if a person waits until marriage to engage in sexual activity or only has one partner.
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M. J. Schleiden:
In the year 1838, a German botanist presented the first cell theory (Although his theory was ultimately disproved, it did contribute to a change in scientific focus to cellular processes.)
<h3>
What is cell?</h3>
All living creatures and body tissues are made up of the smallest unit that can live on its own. The cell membrane, nucleus, and cytoplasm are the three primary components of a cell. The cell membrane encloses the cell and regulates the molecules that enter and exit it.
His theory: Cells make up all plant tissues, and an embryonic plant is made up of just one cell. He declared that the cell is the fundamental building block of all plant matter.
Louis Pasteur- 1855 - German physiologist, physician, pathologist; and anthropologist. Added a third to the cell theory: Omnis Cellula e cellula (all cells develop only from existing cells).- Implied that there was no Spontaneous generation.
Rudolf Virchow- In 1862 he conducted a famous experiment supporting the theory that cells can only come from other cells.
His experiment:
Steralized flasks with straight and curved necks were used to heat nutrient broths. Bacteria only developed in the straight necks because bacteria cells from the air settled in the S-shaped necks' curves. Spontaneous gen did not produce proven cells in the broth.
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Catastrophism is associated with major changes that occurs once at a time in a species while gradualism is associated with tiny changes that occurs over a period of time that finally contributes a bigger evolutionary change.
<u>Explanation:</u>
The events that are sudden, short-lived, violent occurring worldwide thereby changing the shape of the Earth is Catastrophic. This process is opposite to contrast to gradualism which is also called as uniformitarianism. This process is associated with slow and also incremental changes. Erosion is the best example for this process.
The formation of major mountain chains and great floods are some of the examples of Catastrophism. Both are associated with the changes that occurs in a species by the time taken for the changes determines whether it is Catastrophism or gradualism.