Page 13 - Biology - XII

1 metre 1 metre

1 2
Nail String
1 metre

1 metre
String

3 4

1 metre
1 metre

1 metre 1 metre

Plants outside the quadrat area
Fig. 2.2: Study of plant population frequency in a grassland/grass fi eld by a quadrat

Suggested way of quadrat area study

(a) Weeds (Amaranthus, Chenopodium, Convolvulus, Plant variety No. 1 Total No. in quadrat 1
Avena (wild oat, grass) and a main crop plant.
(b) Weeds and crop plants in fi eld. Plant variety No. 2 Total No. in quadrat 1

(c) Multiple cropping crops. Plant variety No. 3 Total No. in quadrat 1

(d) Some other plants Plant variety No. 4 Total No. in quadrat 1

VIVA VOCE

Q1. Name one plant species you have studied.
Ans. ______________

Q2. How many diff erent varieties of plants did you observe/study?
Ans. ______________ varieties
Q3. What is the conclusion of your study?
Ans. ______________ species is densely populated in ______________ area.

Q4. What is population?
Ans. Population is the group of individuals of a particular species in a particular area at a given time.

12