Download App

Improvement in Food Resources — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceImprovement in Food Resources2 Marks
Question
What is biological control?
✓

Answer

Biological control is a method of controlling pests such as insects, mites, weeds and plant diseases using other organisms. It relies on predation, parasitism, herbivory, or other natural mechanisms, but typically it also involves an active human management role.

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 "Que-Ans (Each of 2 Mark )" from Improvement in Food Resources→Improvement in Food Resources — all question types→Science STD 9 question papers→Gujarat Board STD 9 question papers→Gujarat Board question paper generator→

Similar questions

Explain the various factors which are responsible for the loss of stored food grains.

→

Give an example for production of transverse wave.

→
Why is the weight of an object on the moon $\frac{1}6$th its weight on the earth?
→
Which kind of plastid is more common in:
Flowers and fruits.
→

A ball weighing 4kg of density 4000kg m–3 is completely immersed in water of density 103kg m–3 Find the force of buoyancy on it. (Given g = 10ms-2)

→

How many cells are present in human body?

→
Honey is more viscous than water. Can you suggest why?
→
Distinguish between balanced and unbalanced force. Give one example of each.
→
A 0.24g sample of compound of oxygen and boron was found by analysis to contain 0.096g of boron and 0.144g of oxygen. Calculate the percentage composition of the compound by weight.
→
Name the following:
  1. Neurons which carry impulses towards brain.
  2. Process of neuron which carries impulses away from cyton.
→