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Olin [163]
3 years ago
15

What are the substances?

Biology
2 answers:
Reil [10]3 years ago
8 0
<h2>Answer:A chemical substance is a form of matter having constant chemical composition and characteristic properties. Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods, i.e., without breaking chemical bonds. </h2>

Explanation:

Tanya [424]3 years ago
6 0
A substance is matter which has a specific composition and specific properties. Every pure element is a substance. Every pure compound is a substance. Examples of substances: Iron is an element and hence is also a substance
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Question 5 unsaved adding a unit to move a susceptible group enough to prevent metabolism is known as
mrs_skeptik [129]
<span>adding a unit to move a susceptible group enough to prevent metabolism is known as shifting.
These phenomena happen especially for liposoluble organism circulating in blood like drugs an hormones.
these molecules circulating blood can be divided into two forms : 
The free-form: which is the active part, it circulates freely in the blood, but are easily metabolised.
The bound form: it can be bound to other molecules from the organisms depending on its affinity like proteins (albumin, glycoproteins). this form is not active but is prevented from metabolism.

Competition for bounding proteins can happen between two drugs for example. If they have a different degree of affinity for proteins, then the most affine will displace the less affine from the protein and bound it, and that is call shifting</span>
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3 years ago
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Anika [276]
The answer is 9 because to find the amount of neutrons you have to take away the atomic number from the mass
7 0
3 years ago
The continental crust is
Ludmilka [50]

<em>The continental crust is up to 70 km thick.</em>  

<u>Explanation</u>:

Upto 40% of the earth is made up of continental crust. <em>Sedimentary, igneous and metamorphic ricks </em>make up the continental crust. It makes up the upper layer of <em>continents and shallow seabed</em> areas near the shores.  

<em>Continental crust</em> is thicker than oceanic crust with a thickness ranging from <em>25 km to 70km continental crust</em> makes up 70% of earth’s volume and is usually located above sea level with a few exceptions like the <em>Zealand continental crust</em> region which is largely under water.  

3 0
3 years ago
Choose the option that best describes the relationship between the cell wall thickness of parenchyma cells versus sclerenchyma c
MatroZZZ [7]
<h2>Permanent tissues in Plant</h2>

Explanation:

A) The cell walls of parenchyma cells are thinner than those of sclerenchyma cells

Plants posses basically two kinds of tissue- meristematic tissue and permanent tissue.

Meristematic tissue is made up of cells which are capable of active division and give rise to other tissues,.

Permanent tissue are already differentiated and usually do not divide.

Permanent tissues are -collenchyma, sclerenchyma and parenchyma.

Parenchyma and collenchyma are living whereas sclerenchyma is non-living.

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3 years ago
Where are endocrine glands found?
NISA [10]
They are found in the body
6 0
3 years ago
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