Form 2 Science - Plant Responses / Plant Responses

The radicles of the seed will grow upwards towards the damp cotton.

The shoots in question 1 exhibit phototropism, which is a type of tropism where the plant grows towards or away from a light source. This response allows the plant to optimize its exposure to light for photosynthesis.

The observation in the figure above is that the roots in beaker B grow upwards against gravity, bend towards moist cotton, and bend away from anhydrous calcium chloride.

The shoots in the figure above are exhibiting geotropism, also known as gravitropism. Geotropism is a type of tropism where plants respond to the force of gravity by growing in the opposite direction. In this case, the shoots are growing upwards against the force of gravity, indicating positive geotropism.

The correct answer is hydrotropism. Hydrotropism is the growth or movement of an organism in response to water. In the figure, the radicles of the germinated seeds are shown growing towards the silica, which suggests that they are exhibiting hydrotropism by growing towards a water source.

The radicles of the seeds will grow downwards because gravity pulls them towards the ground. This is a common phenomenon in plant growth, where the radicle is the first part of the seedling to emerge and it helps anchor the plant and absorb water and nutrients from the soil.

The radicles in the figure above are showing geotropism, also known as positive geotropism. Geotropism is a type of tropism where plants respond to the force of gravity by growing in the direction of the gravitational pull. In this case, the radicles are growing downwards, towards the bottom of the container, which is the direction of gravity. This is a common response in plant roots, as they need to grow downwards in order to anchor the plant and absorb water and nutrients from the soil.

Based on the diagram, the shoots are growing towards the light source. In pic C, the shoots are shown growing towards the light source, which is the correct direction of growth for the shoots after 4 days.

The observation in the figure above is that the roots in the controlled container grow downwards and direct towards the water. This can be seen from the direction of the roots in container A, where they are growing towards the water source. The roots are growing downwards to reach the water, indicating that the roots are seeking water for growth and development.

Tropism enables plants to do photosynthesis. Photosynthesis is the process by which plants convert light energy into chemical energy, allowing them to produce glucose and oxygen. Tropism, specifically phototropism, is a plant's ability to grow towards or away from light sources. By growing towards light, plants can maximize their exposure to sunlight, which is essential for photosynthesis. Without light, plants cannot carry out photosynthesis and would not be able to produce the energy they need to survive and grow. Therefore, the importance of tropism in plants is that it enables them to carry out photosynthesis and obtain the energy they need for their metabolic processes.

Plants have a natural response to light called phototropism, where they grow towards a light source. This is because they need light for photosynthesis, the process by which they convert light energy into chemical energy to fuel their growth and development. Therefore, shoots respond to light in order to receive the necessary light energy for their growth.

The correct answer is "to get support." This is because the diagram shows a plant with roots growing downwards into the soil. The roots of plants provide support for the plant by anchoring it in the ground and preventing it from falling over.

Arrow A can be drawn to show the direction of growth of the roots after 4 days because the roots are growing towards the stimulus in the form of light. This is evident from the setup where the light source is placed at the top. The roots of the plant will naturally grow towards the light source in order to maximize their exposure to light for photosynthesis.

Tropism is important to plants as it enables them to anchor firmly in the soil, absorb minerals for photosynthesis, and absorb water in the soil. With gravity, plants can anchor in the soil to obtain water and minerals, which are essential for their growth and survival. Without gravity, plants would not be able to anchor in the soil and obtain the necessary resources. Additionally, tropism also enables plants to penetrate deep into the soil to find minerals and water, further supporting their nutrient uptake and overall health.

The inference for the diagram above is that the geminated seeds in both container A and B are sensitive to water and respond by growing towards it.