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Ratling [72]
3 years ago
15

What is it called when a molecule uses energy to move across a semipermeable membrane?

Biology
2 answers:
Morgarella [4.7K]3 years ago
8 0
When molecules uses energy for transportation across the cell, then it is known as "Active Transport"

So, option B is your answer.

Hope this helps!
Mrac [35]3 years ago
6 0

Answer: Active Transport

Explanation:

The movement of the particles across membrane needs energy. Energy is required in the condition where there is a movement of particles from a lower concentration to higher concentration.

It requires cellular energy for the movement of the particles. The larger molecules needs energy to move across concentration gradient.

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Which of the following does not occur in telophase?
miss Akunina [59]

Answer:

d. all of the above

Explanation:

8 0
3 years ago
The diagram below shows a process that occurs in cells.
Pavlova-9 [17]
Answer is A. Diffusion
3 0
3 years ago
Suppose the femur bone of an animal has 1,000 atoms of carbon-14 when the animal dies. How many atoms of carbon 14 will be prese
shtirl [24]

Answer:

After 6000 years, approximately 500 atoms of carbon-14 will be left in the femur bone of an animal which had 1000 atoms of carbon-14 when the animal died.

Explanation:

The half-life of a radioactive isotope of an element is the time taken for half the atoms present in a given amount of the element to undergo decay or disintegration. For example, the half-life of carbon-14 isotope is 5730 years. This means that, if there are 100 atoms of carbon-14 present in a given sample of a material, in the next 5730 years, approximately, 50 atoms of carbon-14 will be left in the material.

Since the half-life of radioactive isotopes are constant, these radioactive isotopes are used in the determining the ages of ancient life-forms as well as rocks.

In the given example, after 6000 years, approximately 500 atoms of carbon-14 will be left in the femur bone of an animal which had 1000 atoms of carbon-14 when the animal died.

8 0
3 years ago
How does science impact your life everyday? Would you choose a career in science and why?
Cloud [144]

science can impact our lives with energy we use lots of it and yes I would choose a career in science because you can learn a lot from science like about the vaccines that are out etc basically this part is your opinion

4 0
3 years ago
Read 2 more answers
Nasim is driving on a snow-covered road, and her car begins to slide. The quick behavioral response and the increased heart rate
Luda [366]

Answer:

1. sympathetic

2. parasympathetic

Explanation:

The sympathetic division of the autonomic nervous system triggers the release of stress hormones from adrenal medulla under emergency conditions. There is a series of physiological responses such as increased heart and breathing rate, an increased flow of blood to skeletal muscles, dilation of pupils, etc. These events helped Nasim to fight the stress conditions.  

Once she was relieved, the parasympathetic system is activated that shut down the physiological responses generated by sympathetic division. It slows down the breathing and heart rate and triggers the digestion and absorption of nutrients to restore the energy level of cells.

3 0
3 years ago
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