A Flower is More than a Flower

In an investigation, some students examined a flower. They removed the stamen and brushed it against a piece of dark paper to observe pollen that sticks to the paper. Which of the following might be the title of the investigation?

• How Seeds Germinate

• Growth of Plant Seedlings

• Seed Dispersal in Plants

• Sexual Reproduction in Plants

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The wind blows through the branches of a maple tree. Aaron sees small pieces from the tree fly into the wind. The pieces are about the size of his finger, and they move like tiny helicopters. Which part of plant reproduction does Aaron see happening?

• pollination

• germination

• seed dispersal

• seed production

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The drawing below shows a process that is important to plants. What is most likely happening?

• The bee is bringing water to the plant.

• The plant is being pollinated by the bee

• The plant is getting nectar from the bee.

• The bee is removing insects from the plant.

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The silk tree that grows in Florida can grow as high as 15 meters (about 50 feet). This tree also produces colorful flowers in fall and winter. Look at the parts of the flower. What is the role of the stamen?

• germination

• transpiration

• seed dispersal

• reproduction

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The brightly colored petals of flowering plants attract insects such as bees> The bees help pollinate the plant by picking up pollen? Which part of the plant does the bee pick up pollen?

• stamen

• pistil

• petal

• sepal

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The bald cypress tree produces seeds that are protected within cones. This tree is found in Florida swamps where heavy rains create floods. The flood waters spread the cones throughout the swamps. What role do the flood waters play in the life cycle of the bald cypress?

• pollination

• fertilization

• seed dispersal

• removal of dead leaves

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Maria was doing an investigation that contained the following step:

Remove the stamen. Lightly wipe the tip of the stamen against the black paper. Some of the powdery pollen should stick to the paper.

What was Maria studying?

• growth of a seedling

• germination of a seed

• method of seed dispersal

• reproduction in plants

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What is one role of a plant's stamen and pistil?

• supporting the flower

• producing more plants

• making food for the plant

• transporting water and nutrients

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Jamie wanted to grow tomato plants. He placed five seeds in the soil and watered them. A few days later he noticed that the seeds were beginning to break open, and a plant was emerging. What process did Jamie most likely observe?

• pollination

• fertilization

• germination

• condensation

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A scientist watches honeybees collect nectar from flowers. She wonders whether the bees can see different colors. Which observation might lead her to pose this question?

• The bees seem to recognize one another's sounds.

• The bees land on purple flowers more often than on other colors.

• The bees spend about the same amount of time on each flower.

• The bees almost always land on the inside of the flowers rather than on the outside.

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