All flowering plants have a mechanism to make sure that their blooms develop at just the right time of year, whether in the springtime or autumn. Most respond to the amount of sunlight, and can distinguish between 16 hours of light and 8 hours of light. Some flower only when days are long and nights are short, such as radishes, asters, petunias, and beets. Others, such as chrysanthemums, goldenrods, and poinsettias, flower only when nights are long and days are short.
- Why are so many flowers brightly colored?
- What is the difference between annual, perennial, and biennial flowers?
- When did the first flowers bloom?
- What are comets?
- What is the difference between a bulb, a corm, and a tuber?
- Are there plants that do not grow from seeds?
- What is the difference between self pollination and cross pollination?
- Does the expression “Open sesame!” have anything to do with sesame seeds?
- How do flowering plants make their seeds?
- Which plant spreads its seeds with the help of children at play?
- Do animals ever carry seeds?
- How do seeds become plants?
- What is a seed?
- Do all plants have flowers?
- What are the patterns of stars called?
- How are a water lily’s leaves different?
- Do all plants have leaves?
- Who is called the “father of botany”?
- How many different types of plants are there?
- How do plants grow?
