Download App

Our Environment — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceOur Environment3 Marks
Question
Explain the phenomenon of “biological magnification.” How does it affect organisms belonging to different trophic levels particularly the tertiary consumers?
✓

Answer

Biological magnification refers to the process of increase in the concentration of a toxic chemical with increasing tropic level in a food chain.
Harmful or poisonous substance such as DDT sprinkled to kill pests on plants enters the food chain. The plants absorb these harmful chemicals from soil along with water and minerals. They enter the food chain at producer level and then transfers to the next tropic level. The tertiary consumers get higher levels of these chemicals.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "[3 Mark Questions]" from Our Environment→Our Environment — all question types→Science STD 10 question papers→CBSE Board STD 10 question papers→CBSE Board question paper generator→

Similar questions

What is meant by a primary consumer, secondary consumer and a tertiary consumer? Give one example of each.
→
Iqbal treated a lustrous, divalent element M with sodium hydroxide. He observed the formation of bubbles in reaction mixture. He made the same observations when this element was treated with hydrochloric acid. Suggest how can he identify the produced gas. Write chemical equations for both the reactions.
→
Complete the following chemical equations:
  1. $\text{CH}_3\text{COOC}_2\text{H}_5+\text{NaOH}\xrightarrow{\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }}$
  2. $\text{CH}_3\text{COOH}+\text{NaOH}\xrightarrow{\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }}$
  3. $\text{C}_2\text{H}_5\text{OH}+\text{CH}_3\text{COOH}\xrightarrow{\text{ }\text{ }\text{Conc.}\text{H}_2\text{SO}_4\text{ }\text{ }\text{ }\text{ }}$
→
Define reflex action.
→
Write a displacement reaction for non-metal.
→
‘‘It is a matter of chance whether a couple will give birth to a male child or a female child.’’ Justify this statement with the help of a flow chart showing the fusion of sex chromosomes.
→
At what distance should an object be placed from a convex lens of focal length 18cm to obtain an image at 24cm from it on the other side? What will be the magnification produced in this case?
→
Explain why, more complex multicellular organisms cannot give rise to new organisms through regeneration.
→
Suppose you have to extract metal M from its enriched sulphide ore. If M is in the middle of the reactivity series, write various steps used in extracting this metal.
→
Explain with the help of labelled ray diagram, the defect of vision called myopia and how it is corrected by a lens.
→