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2 years ago

A scientist helps a colleague do a better experiment by:

Biology

2 answers:

ZanzabumX [31]2 years ago

6 0

Answer:

A.) providing a warning about a common mistake.

Explanation:

they help their student by recognizing a common mistake, and take action not to do it.

Hope this helped!

~Lunar Rose. Moon

Nikitich [7]2 years ago

5 0

The answer would be a.) as in b.) phony means fraudulent or ingenuity, meaning the observations would be incorrect, c.) is poor behaviour and for d.), if there is no evidence the scientist can not accurately conclude their results. Hope that helped :)

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The light reactions require the cooperation of 2 photosystems to power linear electron flow from h2o to NADP+.?

Iteru [2.4K]

Answer:

Only Photosystem I - 1, 5, 6

Only photosystem II - 3, 2

Both Photosystem I and II - 4

Explanation:

Only Photosystem I

a) Reduction of NADP+ - uses light energy to convert NADP+ to NADPH2

b) Reduction of electron transport chain between the two photosystems

c) Oxidation of electron transport chain between the two photosystems.

Only photosystem II

a) Oxidation of water - here the absorbed light energy is used to dissociate of water molecules to produces protons (H+) and O2 along with free ions

b)Reduction of primary electron acceptor - An electron is taken by pheophytin which is a primary electron acceptor molecule that is located within photosystem II and hence it get reduced.

Both Photosystem I and II

a) Light is absorbed in both photosystem I and II. While in photosystem I, light waves of large wavelength i.e 700 nm are absorbed, in photosystem II light waves of short wavelength of i.e 680 nm are absorbed.

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2 years ago

Describe the steps in making packaging and exporting a protein from a cell

irina [24]

Answer:

The steps in making packaging and exporting a protein from a cell are listed below in the following points:

Protein is made from the Ribosomes.

These proteins are gathered in the endoplasmic reticulum.

From ER the proteins are exported to the Golgi bodies. These Golgi apparatus is found in the vesicles.

The Golgi bodies modify the protein to suitable forms that can be absorbed.

Finally it is transported to all part of cells in our body.

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1 year ago

Autonomic centers in the ________ exert neural control over hormone secretion by the adrenal medullae. a) pineal gland b) pituit

frez [133]

Answer:

The correct answer will be option-E

Explanation:

The autonomic nervous system or ANS activity in the brain is mainly controlled and regulated by the hypothalamus structure. The autonomic centres of the hypothalamus control the hormonal secretion adrenal medulla like adrenaline and norepinephrine.

The secretion of the hypothalamus controls the activity of the vasomotor center which help maintain the blood pressure.

Thus, option-hypothalamus is the correct answer.

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2 years ago

Gatorade is a common beverage athletes drink. Gatorade can be made from powdered drink mix and water. In this solution, which is

Allushta [10]

Answer:

The solute is powdered drink mix

Explanation:

The solute is powdered drink mix is solute because solute is any substance that dissolves in a solvent while solvent is the substance that dissolve solute or the dissolving medium. When solute dissolve in solvent it is called solution.

Solution is an homogeneous mixture of substance which comprises of solute that dissolve in solvent.

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2 years ago

This image shows the various forces acting on a block of rock situated on a rock slope. What does arrow 4 represent?

AlladinOne [14]

Answer:

4 is gravitational force

Option B

Explanation:

This is a force diagram of a block on an inclined plane.

The force component is what makes up weight in the diagram. Weight is given as mass multiplied by the gravity.

Gravitational force acts downward and it is the force of attraction between all objects and the earth. It is directly proportional to mass.

Force 1 and 2 are both shear forces that acts parallel to the face of the incline. They are mostly expressed as frictional forces.

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2 years ago