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adoni [48]
3 years ago
15

How many atoms lined up side by side would equal the thickness of a book page?

Biology
1 answer:
harina [27]3 years ago
3 0
More than 1 million atoms lined up side by side would equal the thickness of a book page. The modern atomic theory was proposed in 1803 by English chemist John Dalton. His premise is based on the fact that all elements are composed of atoms. An atom is defined as the smallest part of an element. It also keeps the identity of the element. Individual atoms are very small. Most elements in their pure form exist as individual atoms. Some elements are made up of groups of atoms. 
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Similarities and differences between intramembranous and endochondral ossification
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</span>Similarities between intramembranous and endochondral ossification<span>; they turn cartilage into bones during bone formation and they both involve bone cells such as calcium, vascular supply and osteoblasts.
</span>Differences between intramembranous and endochondral ossification<span>; In intramembranous ossification, an intermediate cartilage is not involved, rather the bone tissue is directly laid on a primitive connective tissue called mesenchyma while in endochondral ossification, cartilage is used as a precursor for bone formation. Also, in cases of fractures, the healing process by plaster of Paris occurs through endochondral ossification while fractures which are treated by open reduction and internal fixation are healed by intramembranous ossification.
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6 0
3 years ago
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Rheumatoid arthritis is caused by: A. a bacteria B. a virus C. a reaction to an immunization D. an autoimmune reaction
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4 0
3 years ago
Type the correct answer in each box. The atomic number of sodium (na) is 11. The element phosphorous(p) is the fourth element to
alexgriva [62]

Answer:

The atomic number of phosphorus is 15. It has zero charge because it has 15 electrons.

7 0
3 years ago
Which of the following are functions of the sinuses? (Select all that apply.)
Tanya [424]

Answer: D,C

Explanation:

7 0
3 years ago
During respiration, most ATP is formed as a direct result of the net movement of potassium against a concentration gradient pota
Fantom [35]

Answer:

b. False

Explanation:

All living organisms such as plants and animals require energy to function properly (life activities). Thus, the organelle where energy from nutrients is released is generally referred to as mitochondria. Animals retrieve energy using mitochondria to do cellular respiration because they typically act like a digestive system by taking in nutrients, breaking them down and obtaining energy rich molecules for cell-life activities.

Cellular respiration can be defined as a series of metabolic reactions that typically occur in cells so as to produce energy in the form of adenosine triphosphate (ATP). During cellular respiration, high energy intermediates are created that can then be oxidized to make adenosine triphosphate (ATP). These intermediary products are produced at the glycolysis and citric acid cycle stage.

Basically, mitochondria is one of the cell organelles found in all living organisms and it is known as the powerhouse. Therefore, mitochondria provides all the energy required in the cell by transforming energy forms through series of chemical reactions; breaking down of glucose into Adenosine Triphosphate (ATP) used for providing energy for cellular activities in the body of living organisms.

Hence, during respiration, most ATP is formed as a direct result of the net movement of protons down a concentration gradient but not potassium against a concentration gradient potassium.

8 0
3 years ago
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