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

Total questions: 15

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

Bryophytes

Pteridophytes

Angiosperms

Gymnosperms

None

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

Amniotic eggs

Moist skin

Lungs with high surface area

External fertilization

None

How do fungi obtain their nutrients?

Photosynthesis

Absorption

Chemosynthesis

Ingestion

None

How do cnidarians capture their prey?

By filtering water

Using a radula

Using muscular tentacles

With stinging cells called nematocysts

None

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

Gymnosperms have naked seeds.

Gymnosperms do not produce seeds.

Gymnosperms have seeds enclosed in fruits.

Gymnosperms produce flowers.

None

Which characteristic is unique to members of the phylum Chordata?

Notochord

Exoskeleton

Radial symmetry

Jointed appendages

None

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

Segmented body with jointed appendages

Cylindrical, unsegmented body

Radial symmetry with a water vascular system

Soft body often protected by a hard shell

None

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

Conducting photosynthesis

Releasing spores

Absorbing nutrients and anchoring the plant

Producing seeds

None

What is the primary role of mycorrhizae in plant biology?

Photosynthesis

Nutrient absorption

Water transport

Nitrogen fixation

None

10.

What distinguishes echinoderms from other invertebrate phyla?

Jointed appendages

Presence of a notochord

Exoskeleton

Water vascular system

None

11.

Which of the following is a characteristic feature of nematodes?

Segmented bodies

Unsegmented, cylindrical bodies

Radial symmetry

Jointed limbs

None

12.

Which phylum includes animals that exhibit pentaradial symmetry as adults?

Mollusca

Echinodermata

Arthropoda

Annelida

None

13.

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

Annelids have an exoskeleton.

Annelids have radial symmetry.

Annelids have jointed appendages.

Annelids have a segmented body without jointed appendages.

None

14.

What is the main difference between monocot and dicot stems?

Both have vascular bundles arranged similarly.

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

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

Monocot stems lack vascular bundles.

None

15.

What is the role of the notochord in chordate embryos?

It functions in respiration.

It supports the developing embryo.

It regulates metabolic processes.

It aids in digestion.

None

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

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