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Nata [24]
3 years ago
6

A catalyst is a chemical:

Biology
2 answers:
AlekseyPX3 years ago
4 0
A catalyst is a chemical that is present during a chemical reaction, but does not actually participate in the reaction as a reactant or a product. It does, however, lower the activation energy of the reaction, making the reaction easier to accomplish. Therefore, it speeds up a reaction without actually taking part.
grigory [225]3 years ago
3 0
Is a substance that speeds up a chemical reaction, but is not consumed by the reaction
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Spores and seeds have basically the same function-dispersal-but are vastly different because spores ________. (A) have a protect
sweet-ann [11.9K]

Spores and seeds have basically the same function-dispersal-but are vastly different because spores (D) are unicellular; seeds are not.

<h3>What are  unicellular organism?</h3>

A unicellular organism can be regarded as  single-celled organism, which are those organisms  that consists of a single cell.

This is different from   multicellular organism  because it consists of multiple cells however  Organisms  can be selected base on  general categories which are  prokaryotic organisms and eukaryotic organisms.

It should be noted that Spores and seeds have basically the same function-dispersal-but are vastly different because spores (D) are unicellular; seeds are not.

Therefore option D is correct.

Read more about Spores here:

brainly.com/question/3529377

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8 0
1 year ago
When the polymerase chain reaction (PCR) is used to amplify segments of DNA, the sample is first heated, and then cooled, in cyc
baherus [9]

Answer:

At least 17 PCR cycles or 16 PCR cycles

Explanation:

As we know -

In one chain of  heating and cooling  of polymerase chain reaction (PCR), the strands of DNA gets doubled.

The general mathematical representation of this is

{2^n - (2 *  n)}

where "n" is the number of PCR cycles.

It is given that DNA strands  to be produced is 16 times the original quantity of DNA.

So the PCR cycle must be carried out at least 17 times in order to have DNA strand not less  than 16 times the original quantity of DNA

8 0
3 years ago
What is a substance that increases the hydrogen ion concentration in a solution.
MissTica

Answer:

Explanation:

Acid. is a substance that increases the hydrogen ion concentration in a solution.(hight H+ concentrations) ~When hydrochloric acid is added to water, hydrogen ions dissociate from chloride ions: HCl -> H+ + Cl− ~Addition of an acid makes a solution more acidic.

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Why do navigators measure speed in knots?
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I think the answer is C) Knots are related to the global coordinate system.
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Alcohol,nicotine, and caffeine.
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