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umka2103 [35]
3 years ago
6

Which star has the greatest luminosity?

Biology
2 answers:
Volgvan3 years ago
7 0

Answer:

b i guess

Explanation:

Artemon [7]3 years ago
4 0

Answer:

c

Explanation:

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Which dark solar feature is shown in the picture above?
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2 years ago
Facilitated diffusion requires
KiRa [710]

Answer:

<h3>A. </h3>

Explanation:

<h3>Tutorial</h3><h3>Diffusion</h3><h3>Diffusion means that the net movement </h3><h3>of particles (molecules) is from an area of high concentration to low concentration.</h3>

<h3>Graph of the simple and facilitated diffusion taking into account the rate of uptake and the concentration</h3>

<h3>If the particles can move through the lipid bilayer by simple diffusion, then there is</h3><h3> no limit to the number that can fit </h3><h3>through the membrane. The rate of diffusion increases linearly as we add </h3><h3>more particles to one side of the membrane.</h3>

<h3>If the particles can only pass through protein channels, then the rate of </h3><h3>diffusion is determined by the number of channels as well as the number of particles.</h3>

<h3>Once the channels operate at their maximal rate, a further increase in </h3><h3>particle numbers no longer increases the apparent rate of diffusion. At this limited rate we describe the protein channel as being saturated.</h3>

<h3>The cartoon illustrates several points about facilitated diffusion. The particles are more concentrated on one side of the membrane, and yet they can move in both directions. However, the net movement is from high particle concentration to low. If the number of particles gets so high on one side of the membrane that they</h3><h3> interfere with diffusion through the </h3><h3>protein channel, then we observe a limit to the rate of diffusion at the point of saturation.</h3>

<h3>Illustration of facilitated diffusion</h3><h3>animation used with permission of the Virtual Cell Web Page</h3><h3>Problem 7 | Answer | Problem 8</h3><h3>The Biology Project > Cell Biology > Cell Membranes > Problem Set</h3>

<h3>The Biology Project</h3><h3>Department of Biochemistry and Molecular Biophysics</h3><h3>University of Arizona</h3><h3>May 2002</h3><h3>Revised: August 2004</h3><h3>Contact the Development Team</h3>

<h3>Simple diffusion does not require energy: facilitated diffusion requires a source of ATP. Simple diffusion can only move material in the direction of a </h3><h3>concentration gradient; facilitated </h3><h3>diffusion moves materials with and against a concertion gradient. </h3>

8 0
3 years ago
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sattari [20]
The vena cava pumps blood from the heart to the rest of the body. false

4 0
4 years ago
Excess carbon gases released into the atmosphere cause additional radiation to be retained and Earth's average temperature to in
sp2606 [1]
Although earthquakes often occur before a volcanic eruption, they are not the cause. The earthquakes are the result of magma (molten rock) moving underground leading up to an eruption. A few volcanic eruptions are thought to have been triggered or initiated by earthquakes, but this is not the typical case.
7 0
3 years ago
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What are the alleles of the parents? <br>NO LINKS, CORRECT ANSWERS PLEASE​
Novosadov [1.4K]

Answer:

BB and bb

Explanation:

You can solve this by conceptually undoing the punnet square. Each one of the children have a dominant allele (B) and a recessive allele (b). This means that all of them will show the dominant trait. So by that, we know one parent must possess BB and the other one must be bb.

hope this helps :)

4 0
2 years ago
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