QQuestionBiology
QuestionBiology
What is the function of the stigma on a flower?
A. It provides a supply of stored nutrients for the seed.
B. It has a sticky surface that helps trap pollen grains.
C. It helps spread seeds away from the parent plant.
D. It attracts birds, bees, and bats to help with pollination.
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Answer
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Step 1:I'll solve this problem step by step, focusing on the function of the stigma in a flower.
Step 2:: Understand the Stigma's Location
The stigma is part of the female reproductive structure of a flower, located at the top of the pistil. It is the receptive surface where pollen grains first land during the pollination process.
Step 3:: Analyze the Possible Functions
Let's examine each option carefully: - Option A suggests nutrient storage for seeds - Option B describes a surface characteristic of the stigma - Option C relates to seed dispersal - Option D discusses attracting pollinators
Step 4:: Evaluate the Stigma's Primary Function
The key function of the stigma is to receive and capture pollen grains. This is accomplished by having a sticky surface that allows pollen to adhere effectively.
Step 5:: Identify the Correct Answer
Option B is the most accurate description of the stigma's function: "It has a sticky surface that helps trap pollen grains."
Final Answer
The stigma has a sticky surface that helps trap pollen grains, which is crucial for successful pollination and reproduction in flowering plants. Explanation: The sticky surface of the stigma is specifically designed to capture and hold pollen grains, facilitating the first step in the fertilization process by allowing pollen to adhere and eventually grow a pollen tube to reach the ovule.
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