Answer:
The correct answer is: B. The amount of air in a room never changes.
Explanation:
- A system is said to be in equilibrium when the net components in the system remains constant (no increase or decrease) with time.
- The air in a room never remains constant and always undergoes dynamic movement into and out of the room. At equilibrium, the net air in the room remains constant as amount of air exiting the room is balanced by the amount of air entering it.
- Evaporation of water in the form of water vapour from a cup into the atmosphere is not in a state of equilibrium as the amount of water evaporating from the cup is not replaced in the cup so there is a net decrease in water level in the cup.
- The decrease in nitrogen percentage in a room is not in equilibrium as the nitrogen concentration of the room is not constant.
- A blade of grass growing taller is not in equilibrium as a constant height of the grasses is not maintained.
The main organelle involved in respiration is the--Mitochondria.
Hope this helps you<3
If the pulmonary artery is blocked, blood would go back up to the right ventricle of the heart.
<h3>What is pulmonary artery stenosis? </h3>
The pulmonary artery is responsible for carrying the deoxygenated blood from the right ventricle of the heart to the lungs to get oxygenated.
Pulmonary artery stenosis is a condition in which the pulmonary artery gets narrowed or blocked. Therefore, blood flow from the heart to the lungs is hampered.
This creates pressure on the walls of the heart. Also, if blood flow towards the lungs is hampered, the heart will not receive the required amount of oxygen. All of this will lead to damage to the heart muscles over the course of time.
Therefore, as a result of the pulmonary blockage, blood would first back up into the right ventricle.
Read more about heart valves and vessels, here brainly.com/question/22836711
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Actually, flowers haven't genders, like " woow, that's a male flower". WROOONG. Flowers have, indeed, parts of themselves that are their male reproductive system and their female <span>reproductive system. Butt* the part of the flower that develop, as you said, into a fruit it's the ovary, after being pollinated by pollen from the anther of another flower (ovary is the female part of the flower and the anthers are the male part)
*that's a joke, ok?
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Answer:
Metals tend to be lustrous, ductile, malleable, and good conductors of electricity.
Explanation:
