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stealth61 [152]
3 years ago
7

Answer the following please question 12 and 13 Hydrogen Helium

Biology
1 answer:
FrozenT [24]3 years ago
3 0

question 12 part a is hydrogen bonds

and 13 is because helium is a noble gas

hope it helps


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Describe ways in which a healthy artery differs from an artery affected by coronary heart disease
JulsSmile [24]

Answer:

A healthy artery is wider and has no blockages. The lumen (which is the hole in the centre of the artery), is open and clear. This means there is more blood flow. An artery of a person suffering from coronary heart disease is often blocked, usually by a fatty deposit. This means the blood does not flow as well. (See diagram, in which I would draw two arteries, one with a blockage of fatty deposit, one clear and healthy).

hope this helped you

please mark as the brainliest (ㆁωㆁ)

3 0
3 years ago
Partical A has very little mass in comparison to partical B. Both Particals are in the same atom. which is the best conclusion a
zhenek [66]

Answer:

D. Particle A orbits the nucleus, and Particle B is located in the nucleus​

Explanation:

Here since both particles are of the same atom and particle A is much lighter we can infer that Particle A is electron because electrons are much lighter than protons which are Particle B in this case. Thus, particle A orbits nucleus as an electron does and particle B is in nucleus where protons are.

5 0
3 years ago
Do ecosystems change over time? Why or why not?
strojnjashka [21]
Ecosystems, the interactive system of living and nonliving organisms in a specific location, CHANGE SLOWLY OVER TIME. When new plants and animals arrive in an area, they either thrive or struggle. Thriving species sometimes displace native species. When this happens, the system as a whole begins to change.
5 0
2 years ago
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What are the responsibilities of the region of the brain highlighted below? Highlighter portion is at the bottom of the brain, f
monitta
The correct answer is "regulating important involuntary bodily functions such as blood pressure, heart rate, breathing and swallowing".
The area highlighted in this example is the posterior part of the brain, called the brainstem. The brainstem is comprised of three important parts, the medulla, the pons and the midbrain. The basic functions of this brain area include breathing, heart rate and sleeping.
6 0
3 years ago
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5. What molecule is essential to regenerate at the end of the Krebs cycle to start the process again?
vitfil [10]

Answer: Oxaloacetate

Explanation: The krebs cycle starts with the pyruvic acid that is obtained after glycolysis. The Kreb's cycle begins when the Acetyl coA combines with a four molecule oxaloacetate.

The main product formed is citric acid thats why the cycle is also called as citric acid cycle. After the citric acid is formed it goes through a series of reactions to form NADH, FADH2 and ATP.

The carbon dioxide is also released during this process. The oxaloacetate formed is used to start the cycle so its is regenerated again and again.

7 0
3 years ago
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