English

What Are Planktons? - Science

Advertisements
Advertisements

Question

What are planktons?

Solution

The tiny herbivorous plants and animals present in water are known as plankton. Plankton are classified as phytoplankton (plants) and zooplankton (animals).

shaalaa.com
  Is there an error in this question or solution?
Chapter 5: Our Environment - Exercise 1 [Page 226]

APPEARS IN

Lakhmir Singh Biology (Science) [English] Class 10
Chapter 5 Our Environment
Exercise 1 | Q 6 | Page 226

Video TutorialsVIEW ALL [1]

RELATED QUESTIONS

Which of the following are always at the second tropic level of food chains?


List two biotic components of a biosphere.


The following statement is true or false :

Secondary consumers and tertiary consumers, both are carnivores.


Consider the food chain :
Grass → Deer → Lion
What will happen if all the lions are removed from the above food chain?


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?


A food chain occurring in the sea which provides food for many people can be written as :
phytoplankton → zooplankton → X → Y

Name one phytoplankton.


 Explain why, a food chain usually cannot have more than three or four steps.


Answer the following question.
Human body is made up of five important components, of which water is the main component. Food, as well as potable water, are essential for every human being. The food is obtained from plants through agriculture.  Pesticides are being used extensively for a high yield in the fields. These pesticides are absorbed by the plants from the soil along with water and minerals and from the water bodies, these pesticides are taken up by the aquatic animals and plants. As these chemicals are not biodegradables, they get accumulated progressively at each trophic level. The maximum concentration of these chemicals gets accumulated in our bodies and greatly affects the health of our mind and body.

(a) Why is the maximum concentration of pesticides found in human beings?

(b) Give one method which could be applied to reduce our intake of pesticides through food to some extent.

(c) Various steps in a food chain represent :
(a) Food web
(b) Trophic level
(c) Ecosystem
(d) Biomagnification

(d) With regard to various food chains operating in an ecosystem, man is a:
(a) Consumer
(b) Producer
(c) Producer and consumer
(d) Producer and decomposer


Bacteria and fungi are called decomposers.


______ obtained energy from the chemical breakdown of dead organisms.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×