7.1 ADAPTATIONS OF PLANTS

What problem is overcome by the pneumatophores of mangrove trees in a mangrove swamp?

• soft soil

• salty water

• waterlogged soil

• strong sunlight

The following information is related to the characteristics of a plant.

 - Leaves and stems have aerenchyma tissues and many air spaces

- The upper stomata are found on the upper epidermis of the leaves

What is the type of plant described?

• Mesophyte

• Hydrophyte

• Halophyte

Which of the following is true of a halophyte?

• has well-developed fibrous or tap roots

• has roots that are poorly developed

• has shallow roots and deep roots

• has roots with special tissues to prevent plasmolysis in high-salinity soil

which of the following are the adaptations of hydrophytes to float?

I. Xylem tissues

II. Turgidity of cells

III. Aerenchyma tissues

IV. Large air spaces

• I and II

• II and III

• III and IV

• I and IV

The following are characteristics of a habitat.

- Extremely dry and hot

- Very little rain

which type of plant grows in this habitat?

• Mesophyte

• Hydrophyte

• Halophyte

• Xerophyte

In extremely cold climates, plants have the following adaptive features except

• grow close together and nearer to ground

• small leaves

• breathing roots called pneumatophores

• shallow root systems

Which of the following plant is a mesophyte?

• Avecennia sp.

• Hibiscus plant

• Water hyacinth

• Cactus

The statement below are the characteristics of a plant.

- Aerial roots

- Has breathing roots called pneumatophores.

In which habitat does this plant grows?

• Hilly area

• Mangrove area

• Desert

What is an adaptation of xerophytic plant?

• large air spaces

• a large number of stomata

• leaves are modified into thorns

• poor root growth

What is a characteristic of submerged hydrophytes?

• absence of roots

• absence of well developed vascular tissues

• leaves with very small surface area

• presence of plenty of stomata