Class 9 Practice Level 3 – Diversity In Living Organisms Set - 1

Total questions: 15

What is the primary role of mycorrhizae in plant biology?

Nitrogen fixation

Nutrient absorption

Photosynthesis

Water transport

None

Which characteristic is unique to members of the phylum Chordata?

Notochord

Jointed appendages

Radial symmetry

Exoskeleton

None

What adaptation allows reptiles to thrive in terrestrial environments compared to amphibians?

Moist skin

External fertilization

Amniotic eggs

Lungs with high surface area

None

What is the role of the notochord in chordate embryos?

It functions in respiration.

It supports the developing embryo.

It aids in digestion.

It regulates metabolic processes.

None

How do cnidarians capture their prey?

By filtering water

Using a radula

With stinging cells called nematocysts

Using muscular tentacles

None

Which group of plants is known for having a dominant gametophyte generation?

Angiosperms

Pteridophytes

Gymnosperms

Bryophytes

None

What role do the rhizoids of bryophytes play in their survival?

Absorbing nutrients and anchoring the plant

Conducting photosynthesis

Releasing spores

Producing seeds

None

Which of the following best describes the body plan of a mollusc?

Radial symmetry with a water vascular system

Segmented body with jointed appendages

Soft body often protected by a hard shell

Cylindrical, unsegmented body

None

Which phylum includes animals that exhibit pentaradial symmetry as adults?

Mollusca

Echinodermata

Arthropoda

Annelida

None

10.

How do annelids differ from arthropods in terms of their body structure?

Annelids have a segmented body without jointed appendages.

Annelids have an exoskeleton.

Annelids have radial symmetry.

Annelids have jointed appendages.

None

11.

What distinguishes echinoderms from other invertebrate phyla?

Exoskeleton

Water vascular system

Presence of a notochord

Jointed appendages

None

12.

How do gymnosperms differ from angiosperms in terms of reproductive structures?

Gymnosperms have seeds enclosed in fruits.

Gymnosperms do not produce seeds.

Gymnosperms have naked seeds.

Gymnosperms produce flowers.

None

13.

Which of the following is a characteristic feature of nematodes?

Jointed limbs

Radial symmetry

Segmented bodies

Unsegmented, cylindrical bodies

None

14.

How do fungi obtain their nutrients?

Absorption

Ingestion

Chemosynthesis

Photosynthesis

None

15.

What is the main difference between monocot and dicot stems?

Dicot stems have scattered vascular bundles, while monocot stems have vascular bundles in a ring.

Monocot stems lack vascular bundles.

Both have vascular bundles arranged similarly.

Monocot stems have scattered vascular bundles, while dicot stems have vascular bundles in a ring.

None

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Class 9 Practice Level 3 – Diversity In Living Organisms Set - 1

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