मराठी

Which of the Following Are Decomposers of Dead Organisms? Bacteria Fungiviruses (A) No Yes Yes (B) Yes No Yes (C) Yes Yes No (D) Yes Yes Yes - Science

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प्रश्न

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
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उत्तर

yes, yes, no
Bacteria and fungi are decomposers of dead organisms.

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पाठ 5: Our Environment - Exercise 1 [पृष्ठ २२८]

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लखमीर सिंह Biology (Science) [English] Class 10
पाठ 5 Our Environment
Exercise 1 | Q 49 | पृष्ठ २२८

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संबंधित प्रश्‍न

"Energy flow in a food chain is unidirectional" Justify this statement.


"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, 100 J of energy is available to the lion. How much energy was available to the producer?

Plants → Deer → Lion


The following is a food chain that ends with human :

How does this food chain differ form a usual food chain involving human such as : plants → goat → human?


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?


Name the process in which a harmful chemical enters the food chain and gets concentrated at each trophic level.


What provides the energy which then flows through a food chain?
(a) glucose
(b) oxygen
(c) respiration
(d) sunlight


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?


Arrange the following in a correct sequence and form a food chain

Rabbit Carrot Eagle Snake


Write the importance of the food chain.


We should reduce the use of the plastic bags, bottles etc. because ______.


In an ecosystem, herbivores represent ______.


Which of the following is a logical sequence of food chain?


Which of the following is an autotroph?


Natural agents like ______ are the decomposition factors breaking complex forms into simpler units.


The food chain begins with the energy given by the ______.


Each level in the food chain is called a ______ level.


Which group of organisms are not constituents of a food chain?

  1. Grass, lion, rabbit, wolf
  2. Plankton, man, fish, grasshopper
  3. Wolf, grass, snake, tiger
  4. Frog, snake, eagle, grass, grasshopper

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