Which statement about atmospheric pressure near earths surface is true

Which class of molecules functions as chemical signals?

omeli [17]

A hormone is a molecule that functions as a chemical signal. A hormone is a chemical released by a cell or a gland in one part of the body that sends out messages that affect cells in other parts of the organism. Endocrine hormone molecules are secreted (released) directly into the bloodstream. !

7 0

3 years ago

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Compare and contrast the techniques of microscale and miniscale distillation in terms of efficiency of distillation. what are ad

Kitty [74]

Distillation is a process of separation of two liquids on the basis of their difference in the boiling points. There are two types of distillation process- Microscale distillation and miniscale distillation depending on the type of apparatus used for distillation.
In case of microscale distillation, microscale apparatus is used when the volume of liquid to be distilled is less than 5 ml. Whereas, in case of miniscale distillation, miniscale apparatus is used when the volume of liquid is more than 5 ml.
Hickman distilled head is used for microscale distillation whereas a bit larger vessels are used in miniscale distillation.
Micorscale and miniscale techniques have their own advantages. Both these techniques are cost effective, use less equipments and environmental friendly. Miniscale distillation is used yields more product which is easy to measure. Microscale distillation are difficult but it avoids large cumbersome distillation process and instruments.

7 0

3 years ago

If a follicle does not reach maturity during one ovarian cycle, it can finish maturing during the next cycle. True False

Oxana [17]

The statement 'if a follicle does not reach maturity during one ovarian cycle, it can finish maturing during the next cycle' is False.

<h3>What is a follicle?</h3>

A follicle is a multicellular structure located in the ovaries that is able to release reproductive hormones during menstruation.

The ovarium follicle is fundamental during the menstrual cycle rate of a woman.

In conclusion, if a follicle does not mature during the ovarian cycle, then it won't continue the process during the next cycle and will become a structure known as corpus luteum.

Learn more about ovarium follicles here:

brainly.com/question/6000162

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8 0

2 years ago

What is imunisition<br><br><br><br>please help me guys

VLD [36.1K]

<h2>Hey There!</h2><h2>_____________________________________</h2><h2>Answer:</h2><h2>_____________________________________</h2>

$\Large\textbf{ACTIVE AND PASSIVE IMMUNITY}$

Active Immunity, Immunity which is acquired by the own immune response of the body.

Passive Immunity, Immunity which is acquired and dependent upon the antibodies transported from another person or even an animal. A person's immune system does not acquire or make the antibodies itself. A newborn baby acquires passive immunity from its mother through the placenta.

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<h2> </h2><h2> $\Huge\text{Vaccination:}$ </h2>

Vaccination is a artificial active immunity. Artificial because the antibodies are not acquired by any natural infection but it is injected into the healthy body of the person. It is Active immunity because the body does not get already made (from other animal) antibodies but it acts on the small amount of the pathogen which is injected in the body and acquires the antibodies itself. So the person acquires antibodies naturally acting on the antigen. Antigen is any foreign agent which triggers the immune system to produce antibodies against it. Vaccines contains antigen which is a harmless form of the bacteria or a virus that causes the disease you are being immunised against. The bacteria or virus are in small proportion and greatly weakened in the vaccine so they just trigger an immune response without causing any real damage. When Vaccine is injected in the body, the immune system starts to make antibodies of different forms against the antigen(Virus or bacteria in the vaccine). When the appropriate shape antibody reacts with the antigen and forms antibody-antigen complex which destroys the antigen. This means that type and shape of antibody is perfect to work against that antigen, then the immune system start forming only those kind of antibodies in great proportion and the Person gets immunised by the vaccine in a natural way.

<h2>_____________________________________</h2><h2>Best Regards,</h2><h2>'Borz'</h2><h2 />

3 0

3 years ago

Which activity is recommended when working with free weights?

balu736 [363]

An activity recommended when working with free weights is to do like an overhead press ie with the barbell, lift it up to the waist, then thrust it into the air higher than the head and lower it in the same step by step fashion. With the dumbells, one can use a bench and lie back on it and do a pec dec fly bringing the dumbbells towards each other.

8 0

3 years ago