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Archy [21]
3 years ago
7

I NEED HELP WITH ALL QUESTOONS PLEASE

Biology
1 answer:
Ulleksa [173]3 years ago
3 0

Answer:

3) B

4) A

5) B

Explanation:

3) Sun heats up the air of a particular region due to which the air heated rises up ( as hot air is lighter than cool air ). When the hot sir rises , the cool air from other region comes there & like this wind blow.

4) A toaster uses electricity to produce heat in order to toast bread  So here the electric energy is converted to thermal energy.

5) Windmills , Hydroelectricity dams & Ethanol plants have turbines & turbines do have a generator which is to be rotated . When the generator is rotated , electricity is generated.

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Which components of animal plasma membranes reduces the permeability of the membrane to most biological molecules?
jarptica [38.1K]

Cholesterol

The animal plasma membrane is a layer of phospholipids that is entwined with cholesterol and proteins. Cholesterol makes up a small part of the cell membrane's mass and it is present in every cell of the body. Cholesterol maintains the integrity of the cell membrane. It assists in the immobilization of the outer surface of the cell membrane and it reduces the permeability of the membrane to most biological molecules. Cholesterol also perform roles in cell signaling, maintaining fluidity  and protecting important proteins in the membrane.  


6 0
3 years ago
Strontium-90 has a half life of 29 years, how much strontium-90 is left from the Chicago pile reactor that was active around 87
agasfer [191]

Answer:

The answer is below

Explanation:

The half life of a substance is the time required by that substance to reduce to half of its initial value. The half life is calculated using the formula:

N(t)=N_o(\frac{1}{2} )^\frac{t}{t_\frac{1}{2} } \\\\where\ N(t)=quantity\ of\ substance \ remaining, N_o=initial\ quantity\\of\ substance, t=time\ and \ t_\frac{1}{2}=half\ life\ of\ substance

Given that t = 87 years, half life = 29 years, therefore the quantity of strontium-90 left is:

N(t)=N_o(\frac{1}{2} )^\frac{87}{29} \\\\N(t)=N_o(\frac{1}{2} )^\frac{t}{t_\frac{1}{2} } \\\\N(t)=N_o(\frac{1}{2} )^3\\\\N(t)=\frac{1}{8} N_o

That is one-eight of Strontium 90 would be left after 87 years

6 0
2 years ago
What is the first thing that happens in photosynthesis?
Lerok [7]
<span>light energy is captured</span>
4 0
3 years ago
HELP
bija089 [108]

Answer:

B

Explanation:

Amino acids fold to form the protein and give it its functionality. Different orders of amino acids fold differently and make a different shape. The shape of the protein defines its function. The function will vary wildly

4 0
2 years ago
Active transport systems are a form of cell transport that requires energy from molecules of ____________________.ANADPBNADCsuga
posledela
Why did you write the last part I don’t get it I’m
3 0
2 years ago
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