In soil water available for plants is ____.

(a)

gravitational water

(b)

chemically bound water

(c)

capillary water

(d)

hygroscopic water

Read the following statements and fill up the blanks with correct option.
i) Total soil water content in soil is called ______
ii) Soil water not available to plants is called _______
iii) Soil water available to plants is called _____.

(a)

(i)	(ii)	(iii)
Holard	Echard	Chresard

(b)

i	ii	iii
Echard	Holard	Chresard

(c)

i	ii	iii
Chresard	Echard	Holard

(d)

i	ii	iii
Holard	Chresard	Echard

Pedogenesis refers to _____.

(a)

Fossils

(b)

Water

(c)

Population

(d)

Soil

Mycorrhiza promotes plant growth by _______.

(a)

Serving as a plant growth regulators

(b)

Absorbing inorganic ions from soil

(c)

Helping the plant in utilizing atmospheric nitrogen

(d)

Protecting the plant from infection

In a fresh water environment like pond, rooted autotrophs are ______.

(a)

Nymphaea and typha

(b)

Ceratophyllum and Utricularia

(c)

Wolffia and pistia

(d)

Azolla and lemna

Soil formation can be initiated by biological organisms. Explain how?

Sandy soil is not suitable for cultivation. Explain why?

Describe the mutual relationship between the fig and wasp and comment on the phenomenon that operates in this relationship.

How is rhytidome act as the structural defence by plants against fire?

What is myrmecophily?

What is seed ball?

List out any five morphological adaptations of halophytes.

Describe dispersal of fruit and seeds by animals.