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

Total questions: 15

Which of the following is a characteristic feature of nematodes?

Radial symmetry

Jointed limbs

Segmented bodies

Unsegmented, cylindrical bodies

None

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

Moist skin

Lungs with high surface area

External fertilization

Amniotic eggs

None

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

Soft body often protected by a hard shell

Radial symmetry with a water vascular system

Segmented body with jointed appendages

Cylindrical, unsegmented body

None

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

Annelids have an exoskeleton.

Annelids have jointed appendages.

Annelids have radial symmetry.

Annelids have a segmented body without jointed appendages.

None

What is the primary role of mycorrhizae in plant biology?

Nitrogen fixation

Water transport

Nutrient absorption

Photosynthesis

None

How do fungi obtain their nutrients?

Absorption

Ingestion

Photosynthesis

Chemosynthesis

None

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

Gymnosperms have naked seeds.

Gymnosperms have seeds enclosed in fruits.

Gymnosperms produce flowers.

Gymnosperms do not produce seeds.

None

What is the role of the notochord in chordate embryos?

It regulates metabolic processes.

It supports the developing embryo.

It aids in digestion.

It functions in respiration.

None

Which characteristic is unique to members of the phylum Chordata?

Jointed appendages

Radial symmetry

Exoskeleton

Notochord

None

10.

What distinguishes echinoderms from other invertebrate phyla?

Jointed appendages

Presence of a notochord

Water vascular system

Exoskeleton

None

11.

How do cnidarians capture their prey?

Using muscular tentacles

With stinging cells called nematocysts

By filtering water

Using a radula

None

12.

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

Gymnosperms

Bryophytes

Pteridophytes

Angiosperms

None

13.

Which phylum includes animals that exhibit pentaradial symmetry as adults?

Annelida

Echinodermata

Mollusca

Arthropoda

None

14.

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

Producing seeds

Conducting photosynthesis

Releasing spores

Absorbing nutrients and anchoring the plant

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

Monocot stems lack vascular bundles.

Both have vascular bundles arranged similarly.

None

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

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