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12th Biology Monthly Test - 1 ( Botany - Principles of Ecology )

St. Britto Hr. Sec. School - Madurai

12th Biology Monthly Test - 1 ( Botany - Principles of Ecology )-Aug 2020

Time : 2.30 Hours

Part - A

Multiple Choice Question - Answer All Question

Strong, sharp spines that get attached to animal’s feet are found in the fruits of

Argemone
Ecballium
Heritier
Crossandra

Frugivores are otherwise known as

Fruit eaters
Vegetable eaters
Frog eaters
All the above

The composition of carbon di oxide in air is ____________

3%
0.03%
30%
3.02%

Living : biotic, non -living: ___________

symbiotic
abiotic
biotope
ecotope

Ophrys an orchid resembling the female of an insect so as to able to get pollinated is due to phenomenon of

Myrmecophily
Ecological equivalents
Mimicry
None of these

In a fresh water environment like pond, rooted autotrophs are

Nymphaea and typha
Ceratophyllum and Utricularia
Wolffia and pistia
Azolla and lemna

Seed dispersal caused by high turgor pressure is seen in ____________

Gyrocarpus
Diplocyclos
Boerhacvia
Andropogon

The plant of this group are adapted to live partly in water and partly above substratum and free from water

Xerophytes
Mesophytes
Hydrophytes
Halophytes

Which of the following is called as partial stem parasites?

Opuntia
Viscum
Santalum
Cuscuta

Which of the given plant produces cardiac glycosides?

Calotropis
Acacia
Nepenthes
Utricularia

The term "Ecology" was first proposed by

Ernest Haeckel
Reiter
R. Misra
odum

In soil water available for plants is

gravitational water
chemically bound-water
capillary water
hygroscopic water

Which of the given plant produces cardiac glycosides?

Calotropis
Acacia
Nepenthes
Utricularia

Leaves are modified into spines in ________

Opuntia
Asparagus
Argemone
Tribulus

Fungi which grow in soil of burnt areas is called _____________.

parasitic
pyrophilous
pyrenoma
coprophilous

Part - B

Generic 2 - Answer All Question

What is ecological hierarchy? Name the levels of ecological hierarchy.

What are halophytes?

Define ecology.

The organic horizon is generally absent from agricultural soils because tilling, e.g., ploughing, buries organic matter. Why is an organic horizon generally absent in desert soils?

Why are some organisms called as eurythermals and some others as stenohaline ?

What is Phytoremediation ?

What is a fire break?

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

What are Holoparasites?

What are Hemiparasites?

<Green algae are not likely to be found in the deepest strata of the ocean'. Give at least one reason.

What is competition?

Mention two morphological adaptations of hydrophytes.

Explain the terms Hollard, Chresard, Echard.

‘Green algae are not likely to be found in the deepest strata of the ocean’. Give at least one reason.

Part - C

Generic 3 - Answer All Question

What is soil profile? Explain the characters of different soil horizons.

Explain Raunkiaer classification in the world's vegetation based on the temperature.

How does an orchid ophrys ensures its pollination by bees ?

Name the plant which consume insects as a source of nitrogen. Draw the structure of the plant.

What are insectivorous plants?

What are the types of roots seen in epiphytes?

What is vivipary? Name a plant group which exhibits vivipary.

What is mutualism? Mention any two example where the organisms involved are commercially exploited in modern agriculture.
Draw a free floating hydrophyte and label any 2 parts.

List any two adaptive features evolved in parasites enabling them to live successfully on their host?

What is edge effect?

Part - D

Generic 5 - Answer All Question

How do seeds disperse by water?

Give an account of various types of parasitism with examples.

List out any five morphological adaptations of halophytes.

What are the advantages of seed dispersal?
What is soil profile? Explain the characters of different soil horizons.

Describe dispersal of fruit and seeds by animals.

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