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Pepsi [2]
2 years ago
7

What is the variable a scientist changes on purpose?

Biology
1 answer:
irina1246 [14]2 years ago
5 0
Independent Variable
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Explain why ions do not move through ion channels by only simple diffusion, whereas water does move through water channels by si
cluponka [151]

Answer:

Electrical gradient.

Explanation:

Ions DO NOT move in Ion channels by simple diffusion because most ion channels can be:

I) selective of ions pass through it.

II) operating on a "open and close" principle. Where it opens or close on its own accord OR does so ONLY when induced by a specific influence like change in voltage of ion channels.

IN ADDITION to the concentration gradient, ELECTRICAL GRADIENTS (change in membrane voltage) affects the movement of ions through ion channels

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3 years ago
What happens to species diversity WITHOUT Pisaster? *
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Answer:

The starfish Pisaster ochraceus is a keystone species in the rocky marine intertidal communities off the northwest coast of North America. This predatory starfish feeds on the mussel Mytilus californianus and is responsible for maintaining much of the local diversity of species within certain communities. A keystone species is an organism that helps define an entire ecosystem. Without its keystone species, the ecosystem would be dramatically different or cease to exist altogether. This means that if the species were to disappear from the ecosystem, no other species would be able to fill its ecological niche.

Explanation:

Hope this helps!

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2 years ago
Why does the crab and the centipede share the same phylum ?
masha68 [24]

Answer:

An arthropod is an invertebrate animal having an exoskeleton like a crab and a centipede.

8 0
3 years ago
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What is a control in a science experiment? Please help
adoni [48]

Answer:

Hi There! :P

Explanation:

A controlled experiment is simply an experiment in which all factors are held constant except for one: the independent variable. A common type of controlled experiment compares a control group against an experimental group. All variables are identical between the two groups except for the factor being tested.

<em>happy to help!</em>

3 0
3 years ago
What’s the difference between budding, parthenogenesis give two examples?
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Do u have snap bc there’s a gc where we help each other with work if u need it
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