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Stolb23 [73]
3 years ago
12

What are the three main ideas of the cell theory

Biology
1 answer:
FinnZ [79.3K]3 years ago
6 0
all living things are composed of cells
cells are the basic units of structure and function in living things
all cells are produced from other cells
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Identify the correct sentence. A. As a young​ naturalist, Charles Darwin traveled around the world and made many discoveries on
Andreyy89

Answer:

A. As a young​ naturalist, Charles Darwin traveled around the world and made many discoveries on a small British navy​ ship, HMS Beagle.

6 0
3 years ago
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Filtrate is formed as fluid is forced through the walls of the glomerulus and
Goryan [66]

Answer:

initially, collects in the structure indicated by the letter B

Explanation:

Filtrate is formed as fluid is forced through the walls of the glomerulus and, initially, collects in the structure indicated by the letter B.

Urine formed by a kidney collects in the renal pelvis before being drained from the kidney by the urethra and transported to the urinary bladder.

The process by which glomerulus filtration occurs is called renal ultrafiltration. The force of hydrostatic pressure in the glomerulus (the force of pressure exerted from the pressure of the blood vessel itself) is the driving force that pushes filtrate out of the capillaries and into the slits in the nephron.

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4 years ago
An element's atomic number is 74. How many protons would an atom of this element have?
Dmitry [639]
Atomic number of an atom equals to the number of nucleus in the nucleus of the atom. Therefore, the answer is 74.

The proton of an element is never changed. No matter if it's an atom or ion. It's like an ID number for an element. It defines the type of element. Don't mix up atomic number with mass number though, mass number is the total sum of of the number of protons and neutrons in an atom.

Theres one more subatomic particle in an atom, that is electrons. But since they're too light, they won't be counted in mass. Also, the number of electrons in an atom equals to the number of proton, also the atomic number. If the number of electrons is different, it's no longer an atom, but an ion.
3 0
3 years ago
Why does our blood pressure generally go up as we age?
jeyben [28]
The arteries get "hard" and absorb less systolic force
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4 years ago
Veins contain a network of valves to insure a one-way flow of blood but arteries do not. This is because veins must counteract t
Ira Lisetskai [31]

The answer is Gravity. To ensure the one-way flow of blood the veins contain a network of valves which arteries do not have. The reason is for the veins to counteract the force of gravity on flow of blood. For example, to increase the pressure of the blood back to the heart the veins must counteract the force of the gravity.

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3 years ago
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