Plant Structures
How Do Plants Respond to Light?
Plants and Their Different Environments
Flowers and Cones
100
Nadine has carrots in her salad. Which part of the carrot plant is she eating?
A) flower C) root
B) leaf D) stem
C) root
100
Plant roots grow in response to gravity. Which arrow shows the direction they grow?
F
100
Frances wrapped a seedling in a wet paper towel and put it in a cup. She put the cup on its side. How will the stem grow?
A) upward
B) downward
C) back toward the roots
D) straight out of the front of the cup
A) upward
100
Ryan wanted to learn how plants respond to gravity by growing downward. Which of the following parts of the plant is he most likely observing?
A) stem C) leaves
B) roots D) flowers
B) roots
200
Which plant part grows downward because of gravity?
A) flower C) leaf
B) stem D) roots
D) roots
200
Gao did an investigation that showed that a plant will bend toward an unmoving light source. Which picture shows the plant from beginning to end in his investigation?
H
200
The students in Mr. Yung’s third-grade class are growing two tomato plants. The plants do not have tomatoes on them yet.
Consider what you know about how plants grow. Which statement provides reasoning that explains the evidence in the picture?
A) The plants are attracted to each other.
B) The plants are too heavy to stand upright.
C) The plants are growing toward the light from the window.
D) The seeds were not planted straight up in the soil, so the plants are crooked.
C) The plants are growing toward the light from the window.
200
Mary looks at the figure below.
What can Mary say about the function of this part of a plant?
A) It helps support the leaves.
B) It helps the plant reproduce.
C) It helps the plant make food.
D) It helps transport water.
B) It helps the plant reproduce.
300
Food is made in the leaves of a plant. Where does the food from the leaves go next?
A) flower C) seeds
B) roots D) stem
D) stem
300
Devon knows that plants need energy to make food. What is a plant’s energy source?
A) nutrients C) sunlight
B) soil D) water
C) sunlight
300
Which part of the environment would a fruit-tree farmer be most concerned about when fruit trees are budding?
A) light C) gravity
B) touch D) temperature
D) temperature
300
Kyle writes these statements about plants. Which is the only true statement?
A) All plants have cones.
B) An oak tree is not a plant.
C) Many plants grow from seeds.
D) Pine trees have no leaves.
C) Many plants grow from seeds
400
Hideki rolls up a paper towel and puts it in a straw. He puts the straw in a glass of water and observes the movement of water from the glass up the towel.
What does Hideki’s model show?
A) pathway of water from leaves to stem
B) pathway of water from leaves to roots
C) pathway of water from roots through the stem
D) pathway of water from roots directly to the leaves
C) pathway of water from roots through the stem
400
A plant responds to light. It opens its flowers during the day. What will the plant most likely do at night?
A) grow its leaves
B) sprout its stem
C) release its seeds
D) close its flowers
D) close its flowers
400
Some tree blossoms are hardy. That means they can survive temperatures close to 0 ºC. Others are not hardy. They are easily hurt by the cold. The table shows the hardiness of different tree blossoms.
Which tree blossom would you claim would most likely survive a bad frost?
A) lime C) orange
B) lemon D) mandarin
D) mandarin
400
Bettina knows that plants reproduce. Which answer best describes what helps plants reproduce?
A) seeds, flowers, and fruits
B) needles, cones, and seeds
C) stems, seeds, and flowers
D) cones, flowers, and leaves
A) seeds, flowers, and fruits
500
Marco makes a salad with lettuce, spinach, cabbage, and carrots. Which comes from a different plant part than all the others?
A) carrots C) lettuce
B) cabbage D) spinach
A) carrots
500
Carlita wants to compare how plants respond to light. Which of the following investigations should she do?
A) put two plants in a freezer
B) put two plants in a warm spot
C) put one plant in a cold spot and one plant under a lamp
D) put one plant near a window and one plant in a dark corner
D) put one plant near a window and one plant in a dark corner
500
Plants respond to different things in their environment. Which claim best describes how plants respond to temperature?
A) Seeds germinate in very cold weather.
B) Plants grow toward sources of cold temperatures.
C) Different plants germinate at different temperatures.
D) All plants release their seeds after a forest fire.
C) Different plants germinate at different temperatures.
500
Ellen wants to write a report about plants. Which statement would be the best topic for her report?
A) Nutrients for a plant come from the sun.
B) Plants produce seeds inside flowers and fruits.
C) All plants make seeds inside cones.
D) Plants need the right amount of water and sunlight to live.
D) Plants need the right amount of water and sunlight to live.