Among the following which one protects our mother earth?

(a)

O₂

(b)

O₃

(c)

O₄

(d)

O₅

The discovery of Jan Baptist van Helmont was on________________ of the banyan tree

(a)

Height

(b)

Mass

(c)

width

(d)

thickness

Priestley concluded that spring of mint had absorbed _____________.

(a)

CO₂

(b)

O₂

(c)

NO₂

(d)

SO₂

To de-starch the plant, the plant should be kept is darkroom for_________________.

(a)

12 hrs

(b)

6 hrs

(c)

48 hrs

(d)

24 hrs

Identify the emerald green sea slug________________.

(a)

Vaucheria litorea

(b)

Nepenthes

(c)

Droseta

(d)

Elysia chlorotica

Sunlight can peretrate ___________ m into the ocean.

(a)

200m - 400m

(b)

100m - 300m

(c)

100m - 200m

(d)

200m - 600m

The air exchange takes place continuo sly through_______________.

(a)

Grana

(b)

Stomata

(c)

Mitochondria

(d)

Stem

___________________% of water is used to produce carbohydrates by the plants.

(a)

0.01%

(b)

0.001%

(c)

0.1%

(d)

0.6%.

Among the following which one is most biodiverse terrestrial place?

(a)

Africa

(b)

America

(c)

Argentina

(d)

Amazon.

The byproduct of photosynthesis is______________.

(a)

CO₂

(b)

O₂

(c)

H₂O

(d)

Starch