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Nookie1986 [14]
3 years ago
6

The theories on the expansion of galaxies

Biology
2 answers:
Assoli18 [71]3 years ago
8 0

Answer:

  May be Re-examined To Strengthen Science

Explanation:

Science is always strengthened when theories are re-examined.

evablogger [386]3 years ago
3 0

Answer:

The correct answer is:

Maybe Re-examined To Strengthen Science.

Explanation:

Hello!

Let's solve this!

The theories on the expansion of galaxies

The correct answer is:

Maybe Re-examined To Strengthen Science.

Theories can be reevaluated to strengthen or invalidate. In this case we will choose to reinforce science. While it is a theory that so far cannot be proven.

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What are three parts that create an amino acid
Ilya [14]

Answer:

The three parts of an amino acid are the carboxyl group, the amino group, and the central carbon that contains the R group.

Explanation:

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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
Suppose you examined a pedigree of a large family, going back 6 generations. In generation 5, a woman ("G5W") has a serious gene
Westkost [7]

B: A mutation in one of G5W's parents, during gamete formation, created an X-linked dominant disease allele.

You need to analyze the sex gametes.

Boys are XY

Girls are XX

If you have an X-linked dominant disease you need only one affected X gamete to have the disease.

The mother has XX' where X' is de affected and reproduce with a healthy man XY and breed unhealthy boys, but because of the heterozygous gametes you could also have healthy ones XX and XY

6 0
3 years ago
Is a cell membrane more like a brick wall or a chain-link fence? Why?
RideAnS [48]

Answer:chain-link fence

Explanation:a cell membrane is partial permeable which means that it lets some substances through but not other.

8 0
3 years ago
Read 2 more answers
How would planting a variety of plants in a vacant lot help establish an ecosystem in that location?
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Trees would help make a forest. Tall grass would help make a meadow. Hope this helps!
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