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cricket20 [7]
3 years ago
13

Briefly describe why all burners must be turned off before any developing chambers are prepared

Biology
1 answer:
suter [353]3 years ago
3 0
<span>The burners must be turned off because, in the case of liquid chromatography, the eluant solvents being used are flammable. Leaving the burners lit could cause the eluant to catch on fire, putting the scientist at risk.</span>
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A cross country runner runs 8 km in 2 minutes. What is his speed?
oee [108]

The speed of the cross country runner is equal to 4 km/min.

<u>Given the following data:</u>

  • Distance = 8 km.
  • Time = 2 minutes.

To determine the speed of the cross country runner:

Speed can be defined as the distance covered by an individual per unit time and it can be measured in kilometer per minutes (km/min).

Mathematically, speed is given by the formula;

Speed = \frac{distance}{time}

Substituting the given parameters into the formula, we have;

Speed = \frac{8}{2}

Speed = 4 km/min.

Read more: brainly.com/question/13102821

5 0
2 years ago
Which biological scenario(s) best describes phenotypic plasticity for a trait?
DIA [1.3K]

Answer:

C) II and III only

Explanation:

Option 1 is not an example of phenotypic plasticity because each person is born with their own blood type and this doesn't change based on their environment and behavior.

Option 2 is an example of phenotypic plasticity because a person's red blood cell counts can increase based on their environment, i.e. moving to Denver, CO from Death Valley, CA. The higher elevation and decreased oxygen causes your body to produce more red blood cells.

Option 3 is an example of phenotypic plasticity because one twin can be taller than another because of differing behaviors, environments, etc.

5 0
2 years ago
Bomb shelters are found under the school. Some people refer to these areas as the catacombs. true or false?
Dmitriy789 [7]
That would be false. A catacomb is an ancient underground cemetery.

exact meaning: an underground cemetery consisting of a subterranean gallery with recesses for tombs, as constructed by the ancient Romans.
3 0
2 years ago
Which of theses choices is considered an environmental cost?. A.processing expenses B.Pollution relases C.Net profit D.Product p
AURORKA [14]
The answer is B, pollution releases because it negatively affects the environment
7 0
3 years ago
Read 2 more answers
Define the term denature​
GalinKa [24]

Answer:

take away or alter the natural qualities of.

or

destroy the characteristic properties of (a protein or other biological macromolecule) by heat, acidity, or other effects that disrupt its molecular conformation

Explanation:

7 0
2 years ago
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