Biology

Food web explained with examples

len Alfred Ajibola - Mon, 13th July, 2020 @ 11:43: AM

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Academic Questions in Biology

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

The final organisms in a food chain are best referred to as _____.

  • A. saprophytes

  • B. parasites

  • C. commensals

  • D. decomposers

  • E. tertiary consumers

  • F. quatenary consumers

Which of the following is a category of long bones?

  • A. Stunted long bones
  • B. Reduced long bones
  • C. Giant long bones
  • D. Bended long bones
  • E. Curved long bones
  • F. Elongated long bones

The end product of photosynthesis is _____.

  • A. O2
  • B. C​​​​​​2​​​​C5OH
  • C. H2​​​​​O
  • D. CO2
  • E. C6H12O6
  • F. C2H5COOH

The above diagram illustrates a _____.

  • A. Food Chain
  • B. Food Web
  • C. Food Pyramid
  • D. Food Link
  • E. Food Hub
  • F. Food zone

The living cells that makes up cartilages are called _____.

  • A. osteocytes
  • B. osteoblasts
  • C. osteoclasts
  • D. chondroblasts
  • E. chrondocytes
  • F. Osteoprogenitor cells

Which of the following statement is incorrect with regards to chitin?

  • A. Ecdysis is a term associated with chitin
  • B. It is a skeletal material
  • C. It is a type of skeleton
  • D. It is present outside the organism
  • E. It does not grow when the organism grows
  • It is present in ants

Which of the following is NOT a function of the human skeleton?

  • A. Gives Shape
  • B. Provides Protection
  • C. Aids in Locomotion
  • D. Supports Movement
  • E. Assists in Inhalation and Exahalation
  • F. None of the above
  • G. All of the above

Organisms that manufacture their own food through the help of sunlight or chemicals are best referred to as _____.

  • A. autotrophs
  • B. chemosynthetic
  • C. photosynthentic
  • D. chemoautotrophs
  • E. photoautotrophs
  • F. chemoautotrophs

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Food Web

Food chain can be interlinked in a habitat, giving rise to food web. An understanding on the concept of food chain is vital towards comprehending a food web. This is true because a food web is simply a complicated food chain.

Recall that a food chain is a diagram that shows the feeding relationship between organisms (plants and animals) in a given habitat.

Please read on Food Chain here

Please read on Ecological Concepts explained here

In order to properly explain what a food web really is, a diagram that shows its illustration is required. Below is a diagram that shows a food web.

Food Web - Len Academy

Using the above diagram as a point of reference, notice that the feeding pattern is interlinked. In fact, it is this interlinking of food chain that gives rise to a food web.

Consider the explanations below (The diagram serves as our reference):


EXPLANATION 1:

  • Grasshopper feeds on berries.
  • The frog feeds on the grasshopper.
  • A snake feeds on the frog.
  • A titmouse feeds on the snake.
  • The fox eats the titmouse.

The aformentioned observations are illustrated below:

Berries >> Grasshopper >> Frog >> Snake >> Titmouse >> Fox

This illustration (above) is just one of the various food chains shown in the diagram. In this case, it is commenced by the berries, (called producers in a food chain). You will also observe from the diagram that another food chain in the same habitat is commenced by the plantain (also a producer).

Please read on Autotrophic mode of Nutrition and Photosynthesis here

Note: The producers always commence a food chain while the decomposers ends it.

Notice that the food chain commenced by the berries were directly consumed by the grasshopper, greenfly, butterfly and titmouse; (generally referred to as primary consumers) as illustrated in explanation 2.

Food Web - Len Academy

EXPLANATION 2:

Recall that the food chain in explanation 1 began with the berries which were consumed by the grasshopper (called primary consumers).

Notice that apart from the grasshopper feeding on berries, the greenfly, titmouse and butterfly also fed on the berries, thus initiating their respective food chain at the level of a primary consumer.

Once again, it's important to state that the interlinking of food chains will give rise to a food web. In this instance, the interlinking of the separate food chains initiated by the berries and plantains (at the level of the producers) gave rise to the food web as illustrated in the diagram. In addition, a separate food chain was also started (at the level of the primary consumer) by the butterfly, greenfly, grasshopper and titmouse respectively since they all fed on the berries.

The instance below shows the food chain initiated by the greenfly at the level of a primary consumer:

  • Just like the grasshopper, the greenfly also feeds on the berries
  • The ladybird feeds on the greenfly.
  • Dragonfly feeds on the ladybird.
  • The frog feeds on the dragonfly.
  • The snake feeds on the frog.
  • The Buzzard eats the snake

Berries >> Greenfly >> Ladybird >> Dragonfly >> Frog >> Snake >> Buzzard.

The above instance is another food chain although it has some links with the first food chain (in explanation 1).

Note: It is this linking of food chains that gives rise to a food web.

You can attempt Len Academy Questions and Answers on various Subjects here

Food Web - Len Academy

EXPLANATION 3:

  • Based on the fact that the grasshopper fed on the plantain and berries; while the frog fed on the grasshopper, then that's a simple food web in the diagram. This is true because it consists of two separate food chains linked together. The first food chain shows berries >> grasshopper >> frog while the second shows plantain >> grasshopper >> frog. Both food chains were initiated separately by the berries and plantain plants respectively (producers in this case) but ended with the same frog.
  • Also, you may have observed that apart from the dragonfly feeding on the ladybird, the titmouse also fed on the lady bird.
  • Also, the butterfly and titmouse fed on the berries along side the greenfly and grasshopper.
  • Similarly, the rabbit, mouse and grasshopper all fed on plantain.
  • Again, the buzzard and fox feeds on the mouse and rabbit. We can go on and on but the point to note is:

A food web shows multiple food chains or multiple feeding relationships or multiple feeding connections all linked together.

Note: Food web always consist of more than one food chain (at least, a minimum of 2 food chains linked together).

You can read the Bones of the Human Skeleton 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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NOTABLE POINTS IN Biology

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

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