Answer:
Atmosphere refers to the thin blanket of air that surrounds the earth.
It serves many important functions such as:
- It contains a mixture of gases that are essential for the existence of life on earth. For example, carbon dioxide is essential for photosynthesis and oxygen is essential for cellular respiration.
- It also serves as the reservoir of water in the form of water vapor. Thus, it forms an important constituent for the water cycle.
- It maintains the temperature of the earth. Through the greenhouse effect, it maintains the temperature of the earth in limited ranges.
- It protects the earth from harmful rays of the sun. For example, ozone inhibits the entry of most of the UV rays of the sun into the earth environment.
Answer:
four trophic levels
Explanation:
All food chains and webs have at least two or three tropic levels. Generally, there are a maximum of four tropic levels. Many consumers feed at more than one tropic level.
Diptheria is a serious infection mainly caused by a specific type of bacteria. This diseases is associated to different symptoms.
<h3>What is the causing agent?</h3>
This disease is caused by Corynebacterium diphtheriae, which is a specific type of bacteria. Moreover, this bacteria produces toxins and this is the cause of the symptoms.
<h3>How is it transmitted?</h3>
This can be transmitted through saliva droplets from one infected person to a healthy person. Usually, symptoms appear within 5 days after getting the bacteria.
<h3>What are the symptoms?</h3>
Although this disease has many symptoms, the most important ones are sore throat and gray lining on the throat and nearby areas.
<h3>How to prevent it or treat it?</h3>
Antibiotics and antitoxins are often used, but the best is to prevent it through vaccination.
Learn more about diphtheria in: brainly.com/question/13061650
#SPJ1
Answer:
Sand, Silt and Clay
Explanation:
The sand is most coarse so it deposits easier and more often than the clay being finest, but there would still be clay just less of it than sand
Your answer is B Plant cells have cell walls instead of cell membranes because plants have cell walls to support, protect, and carry water through out the cell animals cells don't have that. Its also not A because they both have vacuoles its not C because they both have choralpast.
Your answer is B.
BTW if not B its all of the above.
