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erica [24]
2 years ago
5

please i need help && this is a test so i can improve my grade cause i currently have an overall grade of an f .

Biology
1 answer:
nevsk [136]2 years ago
4 0

Answer:

Explanation:

Microscope

Option C

Eukaryotes

All cells

Organelles

Ribosomes

Endoplasmic reticulum

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Consider two species that diverged while geographically separated but resumed contact before reproductive isolation was complete
dezoksy [38]

Answer:

idc idk and I hate this it is anoying

Explanation:

this is dumb no really dumb

8 0
3 years ago
Staphylothermus marinus is an extremophile archaean that inhabits deep oceanic hydrothermal vents at temperatures near boiling.
ANTONII [103]

Answer:

b

Explanation:

b

3 0
3 years ago
When an action potential arrives at the axon terminal of a motor neuron, which ion channels open?
HACTEHA [7]

Answer:

Calcium voltage gated ion channels

Explanation:

There are two types of ion channels involved in the neuromuscular junction and end plate potentials: voltage-gated ion channel (responsive to changes in membrane voltage which cause the voltage gated ion channel to open) and ligand-gated ion channel (responsive to certain molecules such as neurotransmitters).

The resting membrane potential of a motor neuron goes from -70mV to -50 with a higher concentration of sodium outside and a higher concentration of potassium inside. <em>When an action potential propagates down a nerve and reaches the axon terminal of the motor neuron, the change in membrane voltage causes the calcium voltage gated ion channels to open allowing for an influx of calcium ions. </em>These calcium ions cause the acetylcholine vesicles  to release acetylcholine via exocytosis into the synaptic cleft.

I hope you find this information useful and interesting! Good luck!

3 0
3 years ago
How do you build rna
sergejj [24]

Answer:

Cells make RNA messages in a process similar to the replication of DNA. The DNA strands are pulled apart in the location of the gene to be transcribed, and enzymes create the messenger RNA from the sequence of DNA bases using the base pairing rules

Explanation:

3 0
3 years ago
Read 2 more answers
when Na lost e it shrank and the CI+ grew in size does that say anything about the location of the electrons before and after it
ValentinkaMS [17]

<span>We know that electrons are occupied on a cloud surrounding the nucleus. So which means that the bigger the electron cloud, the bigger the number of electrons. So in this case, since Na shrank so it lost some electrons. And since Cl+ grew in size of the electron cloud so electron was added to it.</span>

3 0
3 years ago
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