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Georgia [21]
3 years ago
9

What is the purpose of having a positive and a negative control?

Biology
1 answer:
erica [24]3 years ago
5 0

Answer:

The positive control should give a large amount of enzyme activity, while the negative control should give very low to no activity. If the positive control does not produce the expected result, there may be something wrong with the experimental procedure, and the experiment is repeated.

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Novel combinations of genes can arise from _______.
sertanlavr [38]

Answer:

reciprocal exchange of dna

7 0
3 years ago
How do scientists use seismic waves to determine the interior structure of Earth?
Rom4ik [11]
<span>Much of our understanding of the basic structure and composition of Earth and the other planets in our solar system is not strenuously debated. We can infer a surprising amount of information from the size, mass and moment of inertia of the planets, all of which can be determined from routine astronomical observations. Measurements of surface chemical composition, either by direct sampling (as has been done on Earth, the moon, and Mars) or through spectroscopic observations, can be used to estimate elemental abundances and the degree of chemical differentiation that occurred as the planets condensed from the solar nebula. Remote observations of the gravitational field can be used to understand how a planet's mass is distributed, whereas the strength and shape of the magnetic field provides some constraint on the structure of a metallic core. The specifics of structure and composition, however, are much more debatable. And it is these details that tell us a much more extensive and ultimately more interesting story about the internal dynamics of the planets and their evolution. As a result, trying to determine them is frontier research in almost all fields of earth and planetary science.
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hope that helped *smiles*
4 0
3 years ago
Read 2 more answers
7
Doss [256]

Answer:

-10

Explanation:

add all temperatures together divide by 5 for your average

6 0
3 years ago
Read 2 more answers
How are atp and adp related?
erastova [34]
ATP is adenosine triphosphate, it is like a fully charged battery in a cell, ADP is basically ATP that has been drained of its energy from a chemical reaction. It is like a dead battery that can be recharged later   ;)
5 0
4 years ago
The following statements all apply to one element:
LekaFEV [45]

Answer:

The correct answer is carbon.

Explanation:

Carbon is the major constituent of almost all organic compound.Carbon in form of carbon dioxide is used during photosynthesis in which the CO2 act as reactant that interact with water to generate glucose and oxygen.

      On the other hand carbon is found in carbohydrates such as glucose contain 6 carbon atoms,found in protein which contain a carboxy terminal end and an amino terminal end,found in the fatty acid monomers of lipid molecules.

4 0
3 years ago
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