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2 years ago

Please answer only if you know the answer I will give brainliest!

Biology

2 answers:

Semenov [28]2 years ago

6 0

Answer:

Describe the differences among meteoroids, meteors, and meteorites.

Explanation:

IrinaK [193]2 years ago

4 0

Centrosomes and lysosomes are found in animal cells, but do not exist within plant cells.

The lysosomes are the animal cell’s “garbage disposal”, while in plant cells the same function takes place in vacuoles.

Plant cells have a cell wall, chloroplasts and other specialized plastids, and a large central vacuole, which are not found within animal cells.

The cell wall is a rigid covering that protects the cell, provides structural support, and gives shape to the cell.

The chloroplasts, found in plant cells, contain a green pigment called chlorophyll, which captures the light energy that drives the reactions of plant photosynthesis.

The central vacuole plays a key role in regulating a plant cell’s concentration of water in changing environmental conditions. follow me

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What is definition of biotechnology

lora16 [44]

The exploitation of biological processes for industrial and other purposes especially the genetic manipulation of microorganisms for the production of antibiotics , hormones, ETC

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How can some single-celled organisms survive even though they are really simple

bija089 [108]

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The enzyme that would be most important for digesting a skinless chicken breast would be

pishuonlain [190]

The enzyme that would be most important for digesting a skinless chicken breast would be a PEPTIDASE.
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An inhibitory stimulus has occurred. B. Chemically gated potassium channels have opened. C. Excessive potassium has diffused out

andrezito [222]

Given question is incomplete. Complete question has been attached.

Answer:

C. Excessive potassium has diffused out causing hyperpolarization.

Explanation:

The nerve action potential can be divided into following stages:

Stimulus is detected by the cell in resting stage.
Sodium channels in the membrane open from where influx of sodium ions occur which is called depolarization
After a while, sodium channels close and potassium channels open from where efflux of potassium ions occur which is called repolarization.
The membrane potential further lowers due to continous efflux of potassium ions which is called hyperpolarization.
After a while potassium channels close and membrane returns to its resting stage.

In the given figure, stage 4 depicts hyperpolarization because the membrane potential has dropped to the lowest point below -70mV. Hence, option C is correct.

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2 years ago

When does cell differentiation occur? Question 1 options: when cells express the same gene when cells express different genes wh

serg [7]

Answer:

The answer is when the cell express different genes.

Explanation:

Cell differentiation is the process when a cell is changed from one cell type to an other and brings more complexity to the system. A cell before differentiation possess all the genes however their expression in turned off. When some external or internal factors trigger the gene expression it starts the cell differentiation. A multicellular organism undergoes several rounds of cell differentiation during its development. Although cell differentiation changes the size, shape and metabolic activity but the genetic makeup or DNA is never changed during cell differentiation.

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