12th Bio Botany one marks - Lesson 7 - Online Test

#1. Arrange the correct sequence of ecological hierarchy starting from lower to higher level.

Individual organism → Population Landscape → Ecosystem

Landscape → Ecosystem → Biome → Biosphere

community → Ecosystem → Landscape → Biome

Population → organism → Biome → Landscape

#2. Ecology is the study of an individual species is called (i) Community ecology (ii) Autecology (iii) Species ecology (iv) Synecology

i only

ii only

i and iv only

ii and iii only

#3. A specific place in an ecosystem, where an organism lives and performs its functions is

habitat

niche

landscape

biome

#4. Read the given statements and select the correct option. (i) Hydrophytes possess aerenchyma to support themselves in water. (ii) Seeds of Viscum are positively photoblastic as they germinate only in presence of light. (iii) Hygroscopic water is the only soil water available to roots of plant growing in soil as it is present inside the micropores. (iv) High temperature reduces use of water and solute absorption by roots.

i, ii, and iii only

ii, iii and iv

ii and iii only

i and ii only

#5. Which of the given plant produces cardiac glycosides?

Calotropis

Acacia

Nepenthes

Utricularia

#6. Read the given statements and select the correct option. (i) Loamy soil is best suited for plant growth as it contains a mixture of silt, sand and clay. (ii) The process of humification is slow in case of organic remains containing a large amount of lignin and cellulose. (iii) Capillary water is the only water available to plant roots as it is present inside the micropores. (iv) Leaves of shade plant have more total chlorophyll per reaction centre, low ratio of chi a and chi b are usually thinner leaves.

i, ii and iii only

ii, iii and iv only

i, ii and iv only

ii and iii only

#7. Read the given statements and select the correct option. Statement A: Cattle do not graze on weeds of Calotropis. Statement B: Calotropis have thorns and spines, as defense against herbivores.

Both statements A and B are incorrect.

Statement A is correct but statement B is incorrect.

Both statements A and B are correct but statement B is not the correct explanation of statement A.

Both statements A and B are correct and statement B is the correct explanation of statement A.

#8. In soil water available for plants is

gravitational water

chemically bound water

capillary water

hygroscopic water

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

Xerophytes

Mesophytes

Hydrophytes

Halophytes

#10. 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

#11. A free living nitrogen fixing cyanobacterium which can also form symbiotic association with the water fem Azolla

Nostoc

Anabaena

Chlorella

Rhizobium

#12. Pedogenesis refers to

Fossils

Water

Population

Soil

#13. Mycorrhiza promotes plant growth by

Serving as a plant growth regulators

Absorbing inorganic ions from soil

Helping the plant in utilizing atmospheric nitrogen

Protecting the plant from infection

#14. Which of the following plant has a non-succulent xerophytic and thick leathery leaves with waxy coating?

Bryophyllum

Ruscus

Nerium

Calotropis

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

Nymphaea and typha

Ceratophyllum and Utricularia

Wolffia and pistia

Azolla and lemna

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

Argemone

Ecballium

Heraitier

Crossandra

#17. Sticky glands of Boerhaavia and Cleome support

Anemochory

Zoochory

Autochory

Hydrochory

#18. Autoecology deals with the study of ________

Community

Population

Individual species

Niche of species

#19. The environment of any community is called

Paratope

Biotope

Opitope

Biotope

#20. The study of soil is called as __________

Lithotripsy

Lithosphere

Pedology

Pedology analysis

12th Bio Botany one marks – Lesson 7 – Online Test | Ecosystem