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Nutka1998 [239]
3 years ago
11

J. J. Thomson’s experiment disproved the theory that an atom

Biology
2 answers:
photoshop1234 [79]3 years ago
5 0

The right answer is indivisible.

The word atom comes from the Greek "atomos" which means indivisible, indivisible. It was therefore perfectly suited to the concept of the atom when it was developed by chemists in the early nineteenth century, ie as the smallest part of a pure body.

Now, we know that atoms are not indivisible, that we can pull out electrons, fission their nucleus, etc ... But the name has remained!

sveta [45]3 years ago
4 0
<span>J. J. Thomson’s experiment disproved the theory that an atom is indivisible.

Because his experiments proved that the atom contains smaller negative particles distributed in a large positive mass, concluding that the atom is not a solid uniform sphere.
</span>
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Thread-like structures that are found in the nucleus of a cell that contains all DNA. *
maria [59]

Answer:

chromosomes

Explanation:

Thread-like structures that are found in the nucleus of a cell that contains all DNA. Each chromosome is made of protein and a single molecule of DNA. Human cell nucleus contains 46 chromosomes or 23 pairs. Half of these chromosomes come from one parent and half come from the other parent.

3 0
2 years ago
The____________are very small blood vessels constituting the end of an artery or vein where the exchange of vital substances tak
solmaris [256]
Answer: the capillaries.

<span>The blood capillaries are blood vessels with very small caliber. They form the blood distribution and collection network in cells. They are the communication between branches originating from the arteries and with the smaller veins. It is on the walls of the capillaries that occurs <span>the exchange of water, oxygen, CO2,  other nutrients and chemical residues.</span></span>
8 0
3 years ago
Most of the body's calcium is found in ________.
atroni [7]

Answer:

Bone.

Explanation:

Calcium is one of the important element present in the body. Calcium plays an important role in the muscle contraction. The calcium ions also acts as a signalling molecule during cell signalling.

The calcium is present in our extracellular fluids, bones, and teeth. The major constituent of calcium is present in the bone. The bone consists of around 90% body;s calcium.

Thus, the correct answer is option (b).

7 0
3 years ago
Scientists and doctors are working hard to find a way to cure cancer. Which cellular process are they studying to try and cure t
Natasha_Volkova [10]

Answer:

<em>The correct option is B) regulation of mitosis</em>

Explanation:

Cancer can be described as a group of diseases which result from uncontrolled, abnormal cell division. The cell division by which the cells divide (except sex cells) is termed as mitosis. Hence, scientists will be studying the regulation of mitosis if they are to find a cure for cancer.

Other options like option A are not correct because only sex cells divide by meiosis. Hence, regulation of meiosis will not cure cancer.

5 0
3 years ago
Initiation elongation and termination are the three main steps in:.
Shalnov [3]

Answer:

Transcription

8 0
3 years ago
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