Reproduction in Organisms Quiz

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What is one of the merits of hydrophytes for adaptation?

Their leaves are thick and have small air spaces inside
They require large roots to extract nutrients from the surrounding water
They fix sunlight and ensure the survival of an aquatic ecosystem (correct)
They cannot survive in excess water

Why are the leaves of hydrophytes thin and flat with large air spaces inside?

To store excess water
To protect against excess water
To provide buoyancy (correct)
To extract nutrients from the surrounding water

What makes the cells of endosperm in angiospermic ovule more efficient in supplying food materials to the developing embryo?

They are haploid due to double fertilization
They are tetraploid due to double fertilization
They are triploid due to double fertilization (correct)
They are diploid due to double fertilization

Why is the process of fertilization in a flowering plant referred to as double fertilization?

Because two male gametes are involved (B) Signup and view all the answers

What makes hydrophytes adapted to survive in excess water in their surroundings?

They have only small roots and can extract nutrients from the surrounding water (C) Signup and view all the answers

Explain the adaptation of hydrophytes to survive in excess water in their surroundings.

Hydrophytes are adapted to survive in excess water by having thin, flat leaves with large air spaces inside for buoyancy, and requiring only small roots as they can extract nutrients from the surrounding water through their tissues. Signup and view all the answers

What is the significance of endosperm in angiospermic ovule?

The endosperm in angiospermic ovule is considered more efficient in supplying food materials to the developing embryo because its cells are triploid due to double fertilization. Signup and view all the answers

Why is the process of fertilization in a flowering plant referred to as double fertilization?

The process of fertilization in a flowering plant is referred to as double fertilization because two male gametes from the pollen tube fertilize both the egg cell and the polar nuclei in the embryo sac. Signup and view all the answers

What are some merits of hydrophytes for the survival of an aquatic ecosystem?

Hydrophytes fix sunlight and ensure the survival of an aquatic ecosystem by providing habitat and food for aquatic organisms, and by contributing to oxygenation of the water through photosynthesis. Signup and view all the answers

How do hydrophytes adapt to their aquatic environment?

Hydrophytes adapt to their aquatic environment by having specialized tissues for extracting nutrients from the surrounding water, and by developing buoyant leaves with large air spaces to stay afloat. Signup and view all the answers

Why do hydrophytes have thin, flat leaves with large air spaces inside?

To give them buoyancy and adapt to their aquatic environment. Signup and view all the answers

How do hydrophytes adapt to survive in excess water in their surroundings?

By having small roots and extracting nutrients from the surrounding water through their tissues. Signup and view all the answers

What is the significance of endosperm in angiospermic ovule?

The cells of endosperm are triploid due to double fertilization, making them more efficient in supplying food materials to the developing embryo. Signup and view all the answers

Why is the process of fertilization in a flowering plant referred to as double fertilization?

Because two male gametes from the pollen tube are involved in the process. Signup and view all the answers

What is one of the merits of hydrophytes for the survival of an aquatic ecosystem?

They fix sunlight and ensure the survival of the aquatic ecosystem. Signup and view all the answers

What are hydrophytes?

Hydrophytes are plants adapted to survive in aquatic environments. They have specialized features that allow them to thrive in water-saturated conditions.

How do hydrophytes benefit aquatic ecosystems?

Hydrophytes contribute to the survival of an aquatic ecosystem by providing food and shelter for aquatic organisms, and by releasing oxygen through photosynthesis.

Why do hydrophytes have thin and flat leaves?

Leaves of hydrophytes are thin and flat with large air spaces inside to provide buoyancy. This adaptation allows them to float on the water's surface, maximizing sunlight exposure for photosynthesis.

Why do hydrophytes have small roots?

Hydrophytes have reduced root systems because they absorb nutrients directly from the water through their tissues.