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AleksandrR [38]
3 years ago
9

By the end of the ____ period, all major animal lineages were present in the seas due to a great adaptive rafiation of animals

Biology
1 answer:
natali 33 [55]3 years ago
6 0

Answer: cambrian

Explanation:

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How will you set up a controlled experiment
satela [25.4K]
Research is necessary to gather data that is used to formulate a hypothesis and to create the experiment.

Identify a problem. The problem is the question you are trying to answer. Without a problem, there is no reason for experimentation.

Formulate a hypothesis. The hypothesis is a statement, based on your research, that is intended to provide a solution to the problem. The hypothesis is what you are trying to prove or disprove.

Conduct your experiment to prove the hypothesis. A controlled science experiment is setup to test whether a variable has a direct causal relationship on another.

Identify your independent and dependent variables. The independent variable is commonly known as the cause, while the dependent variable is the effect. For example, in the statement A causes B, A is the independent variable and B is the dependent. A controlled scientific experiment can only measure one variable at a time. If more than one variable is manipulated, it is impossible to say for certain which caused the end result and the experiment is invalidated.

Do not alter your hypothesis midway through the experiment. The setup of a controlled scientific experiment must be constant. You can not make changes once you have begun, even if the results you are getting do not seem to support your original hypothesis. When you change your hypothesis, you change the entire experiment and you must begin again.

Do not be upset if your results are not what you expect. Some of the greatest scientific advances have come from experiments that disproved the original hypothesis.

Start over again with a new hypothesis or find new variables to manipulate. Scientific advancement is a painstakingly slow process and scientists often spend years and even an entire lifetime working on the same problem.
3 0
4 years ago
Which feature of the earth system is caused by the movement of ions in earths core
maks197457 [2]

Answer:

<em>Magnetic Field</em>

Explanation:

The outer core of the Earth possesses molten iron. This core gives rise to convectional currents. The movement of the convectional currents gives rise to the electric currents which make up the magnetic field of the Earth. The magnetic field of the Earth is also known as the Earth's magnetosphere. This is the area which comprises of the magnetic field of the Earth caused due to the movement of ions inside the core of the Earth.

4 0
3 years ago
Given what you know about Cell Division, what would be your reasoning for why the cell spends the most amount of time in _______
fgiga [73]

Answer:

Interphase is the longest phase in the cell cycle.

Explanation:

6 0
2 years ago
What is a chromosome?
Oduvanchick [21]

Answer:

something you dont have

Explanation:

look it up

4 0
3 years ago
What two components are found as part of an enzyme?
ioda
Apoenzyme and a non-protein
4 0
2 years ago
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