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

Total questions: 15

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

How do cnidarians capture their prey?

Using muscular tentacles

With stinging cells called nematocysts

By filtering water

Using a radula

None

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

Gymnosperms do not produce seeds.

Gymnosperms have seeds enclosed in fruits.

Gymnosperms have naked seeds.

Gymnosperms produce flowers.

None

What distinguishes echinoderms from other invertebrate phyla?

Water vascular system

Jointed appendages

Exoskeleton

Presence of a notochord

None

What is the primary role of mycorrhizae in plant biology?

Nitrogen fixation

Nutrient absorption

Water transport

Photosynthesis

None

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

External fertilization

Amniotic eggs

Lungs with high surface area

Moist skin

None

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

Releasing spores

Absorbing nutrients and anchoring the plant

Conducting photosynthesis

Producing seeds

None

Which phylum includes animals that exhibit pentaradial symmetry as adults?

Arthropoda

Echinodermata

Mollusca

Annelida

None

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

Gymnosperms

Pteridophytes

Bryophytes

Angiosperms

None

10.

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

Annelids have an exoskeleton.

Annelids have radial symmetry.

Annelids have a segmented body without jointed appendages.

Annelids have jointed appendages.

None

11.

Which characteristic is unique to members of the phylum Chordata?

Jointed appendages

Exoskeleton

Notochord

Radial symmetry

None

12.

How do fungi obtain their nutrients?

Ingestion

Chemosynthesis

Photosynthesis

Absorption

None

13.

What is the main difference between monocot and dicot stems?

Monocot stems lack vascular bundles.

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.

Both have vascular bundles arranged similarly.

None

14.

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

Cylindrical, unsegmented body

Radial symmetry with a water vascular system

Soft body often protected by a hard shell

Segmented body with jointed appendages

None

15.

Which of the following is a characteristic feature of nematodes?

Unsegmented, cylindrical bodies

Segmented bodies

Radial symmetry

Jointed limbs

None

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

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