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

Total questions: 15

Which phylum includes animals that exhibit pentaradial symmetry as adults?

Echinodermata

Mollusca

Annelida

Arthropoda

None

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

How do fungi obtain their nutrients?

Chemosynthesis

Photosynthesis

Absorption

Ingestion

None

What is the main difference between monocot and dicot stems?

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

Both have vascular bundles arranged similarly.

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

Monocot stems lack vascular bundles.

None

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

Bryophytes

Pteridophytes

Gymnosperms

Angiosperms

None

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

Producing seeds

Conducting photosynthesis

Absorbing nutrients and anchoring the plant

Releasing spores

None

What is the primary role of mycorrhizae in plant biology?

Nitrogen fixation

Nutrient absorption

Water transport

Photosynthesis

None

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

Cylindrical, unsegmented body

Soft body often protected by a hard shell

Segmented body with jointed appendages

Radial symmetry with a water vascular system

None

Which characteristic is unique to members of the phylum Chordata?

Exoskeleton

Radial symmetry

Notochord

Jointed appendages

None

10.

What is the role of the notochord in chordate embryos?

It supports the developing embryo.

It functions in respiration.

It regulates metabolic processes.

It aids in digestion.

None

11.

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

Annelids have radial symmetry.

Annelids have jointed appendages.

Annelids have a segmented body without jointed appendages.

Annelids have an exoskeleton.

None

12.

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

Lungs with high surface area

Amniotic eggs

External fertilization

Moist skin

None

13.

Which of the following is a characteristic feature of nematodes?

Unsegmented, cylindrical bodies

Jointed limbs

Segmented bodies

Radial symmetry

None

14.

What distinguishes echinoderms from other invertebrate phyla?

Jointed appendages

Presence of a notochord

Exoskeleton

Water vascular system

None

15.

How do cnidarians capture their prey?

Using a radula

Using muscular tentacles

By filtering water

With stinging cells called nematocysts

None

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

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