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Ket [755]
1 year ago
14

A scientist finds that a sample of matter contains three types of atoms. The sample can be any of the following, except:

Biology
1 answer:
Savatey [412]1 year ago
3 0

Answer:

D. mixture

Explanation:

because the mixture is not part of an atom

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A team of biologists develop a new drug, and one team member hypothesizes that the drug is incapable of freely passing across th
matrenka [14]

Answer:

<em>B: The drug is a small charged molecule</em>

Explanation:

Substances can passively diffuse in and out of the cell via the cell membrane in two ways;

  • Simple diffusion
  • Facilitated diffusion

The cell membrane allows small molecules or ions to freely diffuse across it in response to concentration difference between the inner and outer parts of the cell membrane. This is known as simple diffusion.

In facilitated diffusion, special proteins in the cell membrane, known as channel/carrier proteins binds with molecules and facilitates their diffusion across the cell membrane by carrying them through special channels in the membrane.

Hence, to support the alternative hypothesis that the new drug will exhibit simple diffusion across the plasma membrane, the drug should be a small charged molecule.

<em>Correct option: B</em>

5 0
2 years ago
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Biology.
castortr0y [4]
<span>D) on a DNA strand 
nabevno zhe</span>
3 0
1 year ago
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Nonrandom mating tends to _______ the frequencies of ______ genotypes. increase; homozygous decrease; homozygous increase; heter
Solnce55 [7]
<span>The answer depends of the kind of non-randommating. If the non-random mating is the kind of positive assortative mating then it tends to increase the frequencies of homozygous genotypes. Positive assortative mating when individuals mate with other individuals like themselves. If the non-random mating is the kind of negative assortative mating, then the effect is the opposite as of the positive assortative mating, this is it tends to decrease the homozygous genotypes.</span>
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1 year ago
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a 24 kg rock containing 3,528 j of potential energy rests upon the edge of a cliff how tall is the cliff
GenaCL600 [577]
Potential gravitational energy is computed with the formula:

PEgrav=mgh

Where:
PEgrav = Potential gravitation energy (J)
m = mass (kg)
h = height (m)
g = acceleration due to gravity (9.8m/s^2) 

Take note that acceleration due to gravity is a constant. 

All you need to do is put in what you know and solve for what you don't know. So your given is the following:
PEgrav = 3,528J
m = 24 kg
g = 9.8 m/s^2
Put that into your formula:
PEgrav=mgh
3,528J = (24kg)(9.8m/s^{2})(h)
3,528J = (235.2kg.m/s^{2})(h)
\frac{3,528J}{235.2kg.m/s^{2}} = h
15m=h

The height of the cliff is 15m.
4 0
1 year ago
In the open ocean, tiny organisms called _____ perform photosynthesis. They are the primary producers in many _____ that overlap
maw [93]
Tiny organisms called ( phytoplankton ) perform photosynthesis. They are the primary producers in many ( food chains ) that overlap to? form an ( Aquatic food web )
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