The cell theory was constructed by <span>Schleiden and Schwann.
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>Matthias Jakob Schleiden<span> was a German </span>botanist<span> and co-founder of the </span>cell theory, along with Theodor Schwann<span> and </span>Rudolf Virchow (not really credited towards it, he is a contributor to the said theory.
>Robert Hook---largely attributed the cell theory;started the study of cells known as the cell biology.
>Carolus Linnaeus---<span>a Swedish </span>botanist<span>, physician, and </span>zoologist<span>, who formalized the modern system of naming organisms called </span>binomial nomenclature<span>.</span>
Answer :
Fossilization can occur in many ways. Most fossils are preserved in one of five processes : preserved remains, permineralization, molds and casts, replacement, and compression.
Answer : The correct option is, U
Explanation :
As we know that there are four states of matter which are solid, liquid, gas and plasma.
Solid state : In this state, the molecules are arranged in regular and repeating pattern. The molecules are closely packed that means they are fixed and vibrate in place but they can not move from one place to another.
For example : Copper
Liquid state : In this state, the molecules are present in random and irregular pattern. The molecules are closely packed but they can move from one place to another.
For example : water
Gaseous state : In this state, the molecules are present in irregular pattern. The molecules are not closely packed and they can move freely from one place to another and spread out.
For example : Helium gas
Plasma state : In this state, the stars, atoms lose their electrons at very high temperature. The mixture of electrons and nuclei that result is the plasma state of matter.
For example : Sun
In the given incomplete table,
T = solid state
W = example : copper
U = gaseous state
X = example : water
V = plasma state
Hence, the gas would be placed in 'U' box.
Answer:
d. A centrifuged sample of blood would yield a composition of 45% plasma and 55% cells
Explanation:
Blood is a mixture of plasma and formed elements. Plasma consists of the fluid portion of the blood and approximately makes up 55 percent of the blood. On the other hand, the formed elements are the red blood cells, white blood cells, and platelets which make up about 45 percent of blood.
