Answer:
The respiratory system is a biological system consisting of specific organs and structures used for gas exchange in animals and plants. The anatomy and physiology that make this happen varies greatly, depending on the size of the organism, the environment in which it lives and its evolutionary history. In land animals the respiratory surface is internalized as linings of the lungs. Gas exchange in the lungs occurs in millions of small air sacs called alveoli in mammals and reptiles, but atria in birds. These microscopic air sacs have a very rich blood supply, thus bringing the air into close contact with the blood. These air sacs communicate with the external environment via a system of airways, or hollow tubes, of which the largest is the trachea, which branches in the middle of the chest into the two main bronchi. These enter the lungs where they branch into progressively narrower secondary and tertiary bronchi that branch into numerous smaller tubes, the bronchioles. In birds the bronchioles are termed parabronchi. It is the bronchioles, or parabronchi that generally open into the microscopic alveoli in mammals and atria in birds. Air has to be pumped from the environment into the alveoli or atria by the process of breathing which involves the muscles of respiration.
Explanation:
Here, matter is gas, rock, lava and water, energy is heat, light. While the process in a system is melting and motion.
<h3>What is matter?</h3>
Matter is any material that has a mass and occupies space by having volume in classical physics and general chemistry.
Energy is a physical system's ability to perform work. The uppercase letter E is a common symbol for energy.
The act of determining the best intercommunication of processing units, as well as the best type and design of units in a process system.
In the given scenario,
- Mater: gas, rock, lava and water.
- Energy: heat, and light.
- Process of system: melting and motion.
Thus, this way the given scenario can be classified.
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Answer:
D.4
Explanation:
It contains a carbon atom that bonds to six other atoms instead of the four we have been told carbon is limited to. Atoms form molecules by sharing electrons. Carbon has four electrons that it can share with other atoms
Hey,
option (C) is right ...
The three main parts of RNA nucleotide are:
- A nitrogenous base
- A pentose sugar and
- One or more phosphate groups.
