Answer:
In uranium-lead dating, for instance, the radioactive decay of uranium into lead proceeds at a reliable rate. Based on the very old zircon rock from Australia we know that the Earth is at least 4.374 billion years old.
And that's how after rounding we know that earth is 4.5 years old.
Neutrophils component is deficient in a child who has a congenital immunodeficiency that impairs <u>B lymphocyte</u> function.
Neutrophils- A specific kind of white blood cell that aids in the body's defense against infection and is crucial to the immune system. White blood cells are one of the initial immune cells to react when bacteria or viruses enter the body.
B Lymphocytes- By generating antibodies, B cells are essential for pathogen-specific immunity. Immunoglobulins attached to the surface of B lymphocytes allow them to identify soluble antigens, causing them to develop into plasma cells, which can secrete immunoglobulins and produce antibodies. Primary lymphoid tissues include lymphocytes.
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<span>The theory of Alkaline Vents theorizes that life originated deep under the sea around hydrothermal vents. This could be likely because these vents provide plentiful methane and ammonia. Critics, however, point out that high temperatures are not conducive to organic life.</span>
According to the process of isostatic adjustment, basins in the ocean have increased in size
since the last cycle of glaciers came to an end. This isn't the aftermath of the <span>melting of </span>glaciers, instead, this is the recovery of the Earth's surface from the once heavy, thick ice sheets that covered the majority of Europe and North America.
