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3 years ago

How many variables should you have in a control experiment?

Biology

2 answers:

Alexus [3.1K]3 years ago

6 0

It depends on the case, but usually two variables should be in a controlled experiment.

wariber [46]3 years ago

4 0

You should do three variables so you can note the difference

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Indicate which statements are true of proteins. Select all that apply. Multiple select question. They act as receptors on cells'

il63 [147K]

Answer:

React on cell surfaces, catalyze reactions.

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2 years ago

HELP PLEASE DUE SOON

Aleks [24]

Answer:

Adding a lake near any town will most likely increase rainfall because of the added water, and water vapor levels will also increase. Because of the excess water in the environment, more water will be found in the surrounding atmosphere (the same reason precipitation will increase in the area.)

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3 years ago

Proteins may be classified according to their three-dimensional shapes. Determine whether the following examples and description

m_a_m_a [10]

Answer:

-often function as enzymes or transport proteins ⇒ globular proteins

-peptide chains arranged in long strands, or fibers ⇒ fibrous proteins

-peptide chains highly folded into spherical shapes ⇒ globular proteins

-keratins ⇒ fibrous proteins

-hemoglobin ⇒ globular proteins

-water-soluble ⇒ globular proteins

-collagens ⇒ fibrous proteins

-insoluble in water ⇒ fibrous proteins

-generally function in structure and support ⇒ fibrous proteins

Explanation:

Fibrous proteins are composed by large polypeptide chains which interact each other and form large structures. They have water insoluble and have structural and protection functions- they are components of cells and tissues. Examples are: collagen, fibronectin, keratin, elastin, actin.

Globular proteins have a spherical compact structure in which hydrophobic aminoacids are buried inside the structure and hydrophilic aminoacids (which can interact with water molecules) are exposed to the exterior medium. For this, they are water soluble. They have often transport and catalytic functions. For example: hemoglobin, mioglobin, albumin, enzymes in general.

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3 years ago

Based on the Resource Use and Conservation Virtual Lab, Which tactic can do the most to keep the water debt less than the water

Viefleur [7K]

Answer: D. Replacing thermal power plants.

Explanation:

Thermal Power Stations are some of the biggest users of water in the world because water is integral to producing electricity in them. These stations burn fossil fuels like coal which then vaporizes water so that it becomes steam which then drives turbines that produce electricity.

Water is also used for cooling high temperatures produced.

If these thermal stations are replaced with something that uses less water, it will go a long way in keeping the water debt less than the water supply.

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3 years ago

Read 2 more answers

The idea that all cells arise from the division of preexisting cells was first stated by a. Anton van Leeuwenhoek. c. Robert Hoo

Setler79 [48]

The right answer is Rudolf Virchow!
Hope that helped. :)

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3 years ago