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rusak2 [61]
3 years ago
9

PLZ HELP Why might Uranus and Neptune have proportionally less elemental hydrogen in their atmosphere than their more massive co

mpanions, Jupiter and Saturn? Hint: Hydrogen is the lightest element.
Biology
1 answer:
Temka [501]3 years ago
8 0

they are farther from the sun and most of their atmosphere is nitrogen and methane and the are smaller and have a denser core than both saturn and juipter

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In which case would facilitated diffusion be needed?
melomori [17]

Answer:

The voltage-gated potassium channels associated with an action potential provide an example of what type of membrane transport?

A. Simple diffusion.

B.<u> Facilitated diffusion. </u>

C. Coupled transport.

D. Active transport.

You are studying the entry of a small molecule into red blood cells. You determine the rate of movement across the membrane under a variety of conditions and make the following observations:

i. The molecules can move across the membrane in either direction.

ii. The molecules always move down their concentration gradient.

iii. No energy source is required for the molecules to move across the membrane.

iv. As the difference in concentration across the membrane increases, the rate of transport reaches a maximum.

The mechanism used to get this molecule across the membrane is most likely:

A. simple diffusion.

<u>B. facilitated diffusion. </u>

C. active transport.

D. There is not enough information to determine a mechanism.

Carrier proteins - exist in two conformations, altered by high affinity binding of the transported molecule. Moves material in either direction, down concentration gradient (facilitated diffusion). EXAMPLE: GluT1 erythrocyte glucose transporter.

Channel proteins - primarily for ion transport. Form an aqueous pore through the lipid bilayer. May be gated. Moves material in either direction, down concentration gradient (facilitated diffusion). EXAMPLES: Voltage-gated sodium channel, erytrhocyte bicarbonate exchange protein.

This might be helpful... because I don't know anything about facilitated diffusion.

5 0
3 years ago
To occur where faults are 1) Earthquakes are located. 3- less likely more likely
erma4kov [3.2K]

Answer & Explanation:

Earthquakes can strike at any location on Earth and at any point of time. However, some parts of the Earth are more prone to earthquakes than others. Earthquakes happen along the edges of tectonic plates and fault lines and there are three large zones on our planet which are most susceptible to earthquakes.:-)

5 0
3 years ago
Which physical factor, related to the formation of severe weather, has to do with the amount of water vapor in the air?
lord [1]
Increase in temperature. I am not exactly sure what you're looking for but basically water vapour in the air has to do with evaporation of water from the surroundings so it will definitely have to do with the increase in global temperatures brought by global warming
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3 years ago
Is ligase involved in DNA transcription?
Ira Lisetskai [31]
Yes Ligase is involved in dna

5 0
3 years ago
Continental crust is composed of
ioda
Continental crust is mostly composed of different types of granites. Geologists often refer to the rocks of the continental crust as “sial.” Sial stands for silicate and aluminum, the most abundant minerals in continental crust.
6 0
2 years ago
Read 2 more answers
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