Ecosystem: What is an Ecosystem?

len Alfred Ajibola - Tue, 10th December, 2019 @ 09:31: AM

Topics in Biology

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Academic Questions in Biology

Please check out our Test Your Knowledge page to see all Questions and Answers

Cold blooded animals are referred to as _____.

  • A. Homeotherms

  • B. Endotherms

  • C. Poilokitherms

  • D. Ectotherms

  • E. Thermotherms

  • F. None of the above

All reptiles are vertebrates.

  • A. True

  • B. False

_____ cells are responsible for the formation of osteoblasts.

  • A. Osteocytes
  • B. Chondrocytes
  • C. Chondroblasts
  • D. Osteoclasts
  • E. Osteoprogenitor cells
  • F. Osteoblastic

_____ is a bone that constitute the axial skeleton.

  • A. Clavicle
  • B. Scapula
  • C. Patella
  • D. Radius
  • E. Sternum
  • F. Femur

Which of the following is false concerning cartilages and bones?

  • A. Cartilage does not have a direct blood supply while bones have direct blood supply
  • B. The process of ossification replaces a cartilage to bone
  • C. The protein that makes up cartilage is called chondrin while that that makes up bone is called ossein
  • D. Cartilage grows from both ends while bones grow from one of its epiphysis
  • E. They both have living cells within them
  • F. Haversian system is absent in cartilage but present in bones

A diagram showing the movement of energy through a food chain is called a _____.

  • A. Food Chain
  • B. Food Web
  • C. Food Energy
  • D. Food Link
  • E. Food Flow
  • F. Food Pyramid

Which of the following is NOT a part of the wrist bones (or carpal bones)?

  • A. Cuboid
  • B. Scaphoid
  • C. Hamate
  • D. Triquetral
  • E. Pisiform
  • F. Trapezium

The statements below are true concerning arteries except _____.

  • A. The arterial wall has 4 layers

  • B. Tunica Adventitia is the outermost layer of an artery

  • C. Aorta is the largest artery in the human body

  • D. Pulmunary artery conveys deoxygenated blood

  • E. Internal bleeding will occur when a deeply located artery is broken

  • F. Arterial vascular disorders are worsened in people with diabetes and renal failure



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Concept of the Ecosystem:

To better understand the concept of an ecosystem, we need to first realize that living organisms cannot exist in isolation (alone). For instance, you live among other humans. Apart from this fact, other domestic animals (and even insects) may also be found around you.

Together; you, other people and the domestic animals within your area forms a community.

As a student, understanding the concept of a community and other ecological concepts will aid you to better comprehend the ecosystem.

Please read on the various Ecological Concepts here.

Note: The term community emanates from the diversity of organisms living in a particular area.

Think of a community as the population of all species of organisms living in a particular area.

As an instance, the community of organisms in the savanna will include all the populations of grasses, lions, snakes, zebras, buffaloes and other organisms present there in.

Please read more on Savanna here.

Always remember that a community will only consist of the living organisms in a particular area. Non-living things are not a part of the community.

What is an Ecosystem?

An ecosystem can be defined as the community of living organisms (plants and animals) interacting and functioning together with their living and non-living environment.

Ecosystem - Len Academy

Note: It is the function of an ecologist to study the ecosystem, defining it's boundaries and limitations.

Please read on Ecology and Branches of Ecology here.

An important point to understand here is the fact that the ecosystem also consist of the non-living factors. For this reason, it's safe to say that the ecosystem isn't just a community. Rather it has everything to do with the interaction of both the living and non-living parts of the environment.

Please read on the Concept of a Biome here.

Consider the instances below.

  • In a savanna or grassland biome, the grasses require a certain kind of climate, soil and other non-living factors to support their growth.
  • The zebras will feed on the abundant grasses therein.
  • The lions on their part will feed on the zebras.
  • Please read more on Food Chain here.

From the above instance, we will observe that the savanna is composed of a variety of organisms which makes up the grassland (or savanna) community. In this case, the community of organisms are the grasses, zebras and lions.

Also, we will discover that the grasses requires a good climate, soil, sunlight, nutrients and organic matter to grow. Notice that all of these requirements of the grasses are non-living; and they play an important part in the normal functioning and balance of the savanna ecosystem. In fact, without these non-living factors, the ecosystem will not exist in the first place.

Note: An ecosystem is made up of 2 components. These are:

  1. Living Components or Biotic Components.
  2. Non-Living Components or Abiotic Components.
  3. Please read on the Components of the Ecosystem here.

An ecosystem can be small is size, for instance, a small pond. Conversely, it can be very large in size, for example, an ocean. In addition, various ecosystem exists on the lithosphere (land) and hydrosphere (water).

According to statistics, the salt water (seas and oceans) ecosystem makeup about 70% of the earth's surface. Fresh water ecosystem like rivers, streams, lakes and ponds occupy about 1.8% while the terrestial ecosystem accounts for about 28%.

The terrestial ecosystems can be divided into biomes.

Please read on the Tropical Rainforest Biome and its Importance here.

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Alfred Ajibola is a Medical Biochemist, a passionate Academician with over 7 years of experience, a Versatile Writer, a Web Developer, a Cisco Certified Network Associate and a Cisco CyberOps Associate.

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Amazing facts in Biology

Armadillos - Len Academy

Armadillos are western mammals known for their unique armor-like shell which are bulletproof

Polka-dotted zebra - Len Academy

Although 🦓 zebras 🦓 are known for their characteristics black and white stripes, we still have some polka-dotted zebras

Charles Darwin is a British naturalist and biologist who contributed greatly into the study of evolution. According to research, he frequently ate the animals he studied

Lungs are the only human organ that can float on water

Unlike most 🐍 snakes 🐍 that lay eggs, anacondas give birth to live babies

Shrimp - Len Academy

A 🦐 shrimp's 🦐 heart is in its head

Women have more pain receptors than men

It's crucial you finish your antibiotics.

If you stop taking your antibiotics before you're supposed to, any bacteria that didn't get killed can develop an immunity to that antibiotic and become a super-strain, making it much difficult to kill in the future. So keep taking your antibiotics pill, even if you feel better.

Although rare, women can still give birth when they die. This is known as coffin birth

Men can actually get aroused post moterm. This is called priapism


For a thing to be considered Living, it must possess all the Basic Characteristics of Life. These include:

  1. Movement

  2. Respiration

  3. Nutrition

  4. Irritability or Sensitivity

  5. Growth

  6. Excretion

  7. Reproduction

  8. Death

  9. Adaptation

  10. Competition

Please read the explanations on all the Basic Characteristics of Life here

During strenuous exercises like sprinting or 🏃 running, your body may actually work in the shortage of oxygen. During this time, your body owes oxygen (called oxygen debt) and it must be replenished or repayed after the exercise is stopped. This is why you breathe excess of oxygen after you stopped the exercise.

This is the concept of anaerobic respiration

Food Chain - Len Academy

A food Chain is a diagram that shows the relationship between plants and animals within a habitat on the basis of how they rely on each other for food.

Note: Habitat is a place where an organism live. It is of three types:

  • Terrestrial (Land)
  • Aquatic (Water)
  • Arboreal (🌲 Treetops)

You can read on Food Chain here

The term Biology originated from two Greek words. They are:

  • Bios: means life.
  • Logos: means knowledge or to study.

Biology can therefore be defined is the study of life

Anything that has life is generally considered as a living organism (or organism) 🌱🐐🐓. All living organisms must be able to carry the following activities:

  1. Movement
  2. Respiration
  3. Nutrition
  4. Irritability or Sensitivity
  5. Growth
  6. Excretion
  7. Reproduction
  8. Death
  9. Adaptation
  10. Competition

The above listed points are often regarded as the basic characteristics of life. You can memorize them using the acronym (MR. NIGER DAC).

You can read on the introduction to Biology and the basic characteristics of life here

The gas used in the manufacture of food by plants is Carbon dioxide or Carbon(IV)oxide or CO2

Plants manufacture food through a process called photosynthesis.

Please read on photosynthesis here

Note: Plants are the only orgnisms that take away CO2 from the atmosphere