BIOLOGY HIGH SCHOOL

________ is the biogeochemical cycle that describes the movement of oxygen within and between it's three main reservoirs.A. Oxygen Cycle
B. Carbon Cycle
C. Nitrogen Cycle
D. Water Cycle

Answers

Answer 1
Answer: Oxygen cycle is the biogeochemical cycle that describes the movement of oxygen within and between it's three main reservoirs. Hope it helped you. Please mark as the brainliest answer if it helped.
Answer 2
Answer: c is the correct answer

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A lion eating a zebra is an example of which characteristic of life?

Answers

Hi there!  

A lion eating a zebra is an example of growing and developing, since the energy and proteins that have been transferred to the lion from the zebra help the lion grow.  

Hope this helps!
Well its apart of the food chain, but is also apart of the circle of life if you call it that. If you need more detail please ask in the comments I can explain more if needed

Name three STIs that can be life-threatening or lead to life-threatening illnesses.

Answers

There are types of STIs that can be life-threatening or lead to other life-threatening illnesses. These STIs are syphilis, Gonorrhea, human papillomavirus (HPV), hepatitis B, and human immunodeficiency virus (HIV). However, response varies from person to person.
 Gonorrhea, human papillomavirus (HPV), hepatitis B, and human immunodeficiency virus (HIV). However, response varies from person to person.

Choose all the answers that apply. Which of the following minerals can be scratched with a fingernail? -talc
-diamond
-topaz
-quartz

Answers

The minerals can be scratched with a fingernail. Thus, option A is correct.

What is minerals?

Minerals has been defined as a substance which has natural such as coal, oil, salt which has been especially one that has been found just in the ground and some of the mineral has been also found in the food as well as drink and they are very necessary for the betterment of the health.  The main feature of sedimentary rock has that they are formed in the multiple layers. Minerals has been defined as a substance which has natural such as coal, oil, salt.

The main feature of sedimentary rock has that they are formed in the multiple layers of the particles that are organic or the minerals at the surface of Earth, later followed by the process of cementation. The main feature of sedimentary rock has that they are formed in the multiple layers.The rocks are made up of more than one mineral and the size of some rocks are small or big it depends upon their constituents.

Therefore, The minerals can be scratched with a fingernail. Thus, option A is correct.

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- Talc (the softest mineral on Earth)

4. Which of the following statements about reinforcement is true?a. Reinforcement increases the number of intermediate phenotypes.
b. Reinforcement is a type of natural selection.
c. Reinforcement decreases the morphological difference between two incipient species.
d. Reinforcement is also called dispersive selection

Answers

The  statements about reinforcement is true is that Reinforcement decreases the morphological difference between two incipient species.

Option C is correct.

How do we explain?

Reinforcement is  described as a type of natural selection that occurs when two populations that are becoming reproductively isolated from each other start to develop preferences for mates from their own population.

This can lead to a decrease in the morphological difference between the two populations, as they become more adapted to each other's mating preferences.

In conclusion, reinforcement is a type of natural selection, not the other way around. Option d is incorrect because reinforcement is also called assortative mating, not dispersive selection.

Therefore option B is correct

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Your answer would be A

Which blood type can be given to anyone?

A : A
B : B
C : AB
D : O

Answers

Blood type O can be given to anyone.

Answer:

O

Explanation:

Type O blood is the universal donor, meaning anyone can receive Type O blood.  But there's more to it.  Anyone with Rh positive blood can receive O positive blood.  O negative blood can be received by all blood types and Rh factors.

(a) It is possible to measure a patient’s heart rate by either palpating their peripheral pulse, by observing their ECG, or by listening for the lub-dup through a stethoscope. However, patients with atherosclerosis of the femoral artery may not have a pulse in the popliteal artery or dorsalis pedis of the foot. Does this mean that they will also lack a heart beat (lub-dup) or QRS complex? Explain the relationship between a heart beat, pulse, and QRS complex. (B) Why is there a delay between systole of the ECG and the resulting pulse felt in the finger (R-Pulse)?

Answers

b)When you listen to the heart sounds, you are hearing the flow of blood which stops abruptly when a heart valve closes. This produces the "lub-dub" sounds. 1st heart sound (when the Mitral Valve closes) as the ventricle contracts (systole) and then 2nd heart sound (when the Aortic Valve closes) and the ventricle starts to fill again (diastole)
The pulse is the wave of pressure you can feel through the artery walls. This denotes systole.
The ECG's QRS complex is the electrical signal that tells the Ventricles to contract. You can see that the QRS occurs right at the beginning of systole and triggers Isovolumetric contraction.
So the QRS on the ECG, the pulse wave you can feel (ie. the rise in aortic pressure) and the 1st heart sound all signify SYSTOLE.
there a delay between systole of the ECG and the resulting pulse felt in the finger (R-Pulse) because it takes a little bit of time for the pressure to transmit through the body, as the finger is not on the heart (if it was there would be no delay)
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