Advertisements
Advertisements
प्रश्न
The sea water contains water beetles, tadpole, fish and weeds.
Which organism is a secondary consumer?
Advertisements
उत्तर
The water beetle is the secondary consumer in the given food chain.
APPEARS IN
संबंधित प्रश्न
List two biotic components of a biosphere.
Why are green plants called producers?
List two main components of ecosystem?
"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?
In the following food chain, plants provide 500 J of energy to rats. How much energy will be available to hawks from snakes?
Plants → Rats → Snakes → Hawks
What is the difference between the food habits of organisms belonging to the first and the third trophic levels? Give one example each of the organisms belonging to these two trophic levels.
A student went to study a local pond. In one part of the pond she noticed tadpoles scraping at some pond weed. In another part she saw a water beetle holding a tadpole in its jaws.
(a) Construct a food chain for the pond.
(b) How many links are there in this chain?
The sea water contains water beetles, tadpole, fish and weeds.
Write a food chain comprising all the given organisms.
The following is a food chain that ends with human :
plants → bee → human
Explain how plants provide food for bees.
What would happen to the number of grass plants and foxes if the number of rabbits decreased?
Fill in the following blank with suitable word :
Lettuce → ............. → Fox
Fill in the following blank with suitable word :
Plants → Antelope → ............
In addition to wheat plants, a crop field ecosystem has organisms such as snake, peacock, eagle and mice. If the wheat plants are sprayed with pesticides periodically, which of the following will have the minimum concentration of pesticides in the body?
(a) snake
(b) eagle
(c) mice
(d) peacock
The surface of water in a lake appears green due to a layer of tiny free-floating organisms X on its surface. The lake water also contains organisms like water beetle, fish and tadpole. The sun shines over the lake water and provides energy for the functioning of this lake ecosystem.
(a) What could organisms X be?
(b) Write a food chain comprising of all the four organisms mentioned.
(c) What is the general name of the food chains like the one written above?
(d) Name (i) secondary consumer (ii) producer (iii) tertiary consumer, and (iv) primary consumer, in the above food chain.
(e) If the tertiary consumer gets 0.2 J of energy from the secondary consumer, then how much energy was radiated by the sun to the producer?
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.
What would happen if an organism is removed from the food chain?
In a given food chain if the amount of energy at the fourth trophic level is 6 kJ, what will be the energy available at the producer level?
If 100 J energy is available at the producer level in a food chain then the energy available to the secondary consumer will be ______.
In an ecosystem, herbivores represent ______.
Observe the food web and answer the questions given below:

Why do all food chains start with plants?
