Advertisements
Advertisements
Question
The sea water contains water beetles, tadpole, fish and weeds.
Which organism is a secondary consumer?
Advertisements
Solution
The water beetle is the secondary consumer in the given food chain.
APPEARS IN
RELATED QUESTIONS
"Energy flow in a food chain is unidirectional" Justify this statement.
Give reason to justify the following: The existence of decomposers is essential in a biosphere.
The first trophic level in a food chain is always a green plant. Why ?
"Our food grains such as wheat and rice, the vegetables and fruits and even meat are found to contain varying amounts of pesticide residues." State the reason to explain how and why it happens?
A food chain represents a unidirectional flow of X. What is X?
At which trophic level a person is feeding when he is eating apple.
Which of the following are decomposers of dead organisms?
| Bacteria | Fungi | Viruses |
| (a) no | yes | yes |
| (b) yes | no | yes |
| (c) yes | yes | no |
| (d) yes | yes | yes |
In a food chain, the third trophic level is always occupied by :
(a) carnivores
(b) herbivores
(c) decomposers
(d) producers
Organisms which synthesise carbohydrates from inorganic compounds by using radiant energy are called ______.
The following is a food chain that ends with human :
plants → bee → human
How do bees provide food for humans?
Some hunters are roaming in the plush green forest of Africa. They spot a deer and kill it. They decide to roast the deer there and then and eat it. When the hunters had just finished enjoying the feast of roasted deer, a lion attacks them. The lion kills one of the hunters and eats his flesh.
(a) write a food chain which provides food to lion in this case.
(b) Which animal (other than deer) the lion could look for food if he did not get the hunter as prey?
(c) Which other animal in the forest could have been in place of lion?
(d) How does the above food chain differ form the food chain such as : plants → goat → man?
Give one example of a food chain having four organisms. Below each organism write the three appropriate terms from the part (a) above which you think it represents.
The following statement is true or false :
Only 10 per cent of the light energy given by the sun is available for transfer at each higher trophic level in a food chain.
Your mother always thought that fruit juices are very healthy for everyone. One day she read in the newspaper that some brands of fruit juices in the market have been found to contain certain level of pesticides in them. She got worried as pesticides are injurious to our health.
(a) How would you explain to your mother about fruit juices getting contaminated with pesticides?
(b) It is said that when these harmful pesticides enter our body as well as in the bodies of other organisms they get accumulated and beyond a limit cause harm and damage to our organs. Name the phenomenon and write about it.
Which of the following is a logical sequence of food chain?
In a food chain grasshopper gets energy by eating frog.
What is Autotrophs?
Study the picture given below showing three food chains (a), (b) and (c) and answer the following questions:

- Name the type of ecosystems that exist in food chains (b) and (c).
- The first trophic level in all food chains is producers. Why? What percentage of solar energy do these producers capture for their use?
- Why are the arrows shown in the diagram in one direction only and not vice versa? Justify.
