Which type of movement is shown by Tulip and Sunflower respectively ?

Options

A. Thermonasty and photonasty
B. Hydronasty and photonasty
C. Thigmonasty and photonasty
D. Hydronasty and thermonasty.

Answer

To answer the question about the type of movement shown by Tulip and Sunflower respectively, we can follow these steps:

### Step 1: Understand the movement of Sunflower
- The sunflower exhibits a movement known as **phototropism**. This is a growth response to light, where the flower turns to face the sun as it moves across the sky from east to west. This movement is specifically termed **photonastic movement** because it is a non-directional response to light.

### Step 2: Understand the movement of Tulip
- The tulip, on the other hand, responds to changes in temperature and touch. This type of movement is known as **thermonasty**. The tulip flowers open and close based on the temperature changes in their environment, rather than in response to the direction of light.

### Step 3: Summarize the findings
- Therefore, the type of movement shown by the sunflower is **photonastic movement**, while the tulip exhibits **thermonastic movement**.

### Final Answer:
- **Sunflower**: Photonastic movement
- **Tulip**: Thermonastic movement

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