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Free_Kalibri [48]
4 years ago
15

PLEASE HELP ME!!!!!

Biology
2 answers:
evablogger [386]4 years ago
7 0

Answer:

C. Evidence of ancient tropical swamps in cold regions of North America

Explanation:

I took the test here is my proof that this is correct (Hope I helped):

Inessa [10]4 years ago
6 0
A sea floor spreading at mid ocean ridges
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The neurotransmitter glutamate opens channels that are permeable to sodium ions. What effect does glutamate produce on a postsyn
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Answer:

D) EPSPs

Explanation:

Glutamate is a very important and powerful excitatory neurotransmitter. It is largely secreted by nerve cells present in the brain. Glutamate is known to bind ionotropic receptors. By ionotropic we mean to say that on ligand binding, such receptors tend to open and allow passage of ions. As soon as glumatate binds its receptor present on the plasma membrane, it causes excitatory electrical responses to occur by opening Na⁺ channels which causes influx of Na⁺.  More Na⁺ inside the neurons leads to the change in the membrane potential which is known as EPSPs (excitatory postsynaptic potential) and this state is known as depolarized state.

In short, glutamate causes sodium ion channels to open up in the neurons and this flow of Na⁺ is known as excitatory postsynaptic current (EPSC) and as explained in the paragraph above, this EPSC finally leads to EPSPs (excitatory postsynaptic potential).

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3 years ago
Some salmon have been genetically engineered to grow more quickly.the salmon are raised in pens set in rivers or in the sea. dec
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The effect of genetically engineered salmon which allows the faster growth rate of the species is that the supply will not be shortened any time soon. However, it may be properly studied if these genetically engineered species are safe for the consumers. 
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Compare and contrast chemical weather by water
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Answer:

Physical and chemical weathering often happen at the same time, but the ... Water that freezes in cracks and forms ice, salt from evaporated seawater, ... For example, the rocks on a riverbed smooth each other because they collide in the current. ... Oxidation is the reaction of oxygen with chemicals in a rock.

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