Plants

Which pair of pictures shows nonflowering plants?

• A

• B

• C

• D

The graph shows the best times to plant and harvest (pick) three different vegetables in northern regions of the United States. Which conclusion is best supported by the data?

• Squash seeds sprout best in April and May

• Squash and radishes can both be picked in August.

• Lettuce is the only type of vegetable that can be planted in more than one month

• Lettuce and radish seeds become mature plants in about the same length of time

​The plants shown above can be classified together because ________ .

• All of them are trees

• All of them produce cones

• all of them are non-flowering

• all of them reproduce through spores

​Based on this model, what is happening during the stage of the plant’s life cycle

labeled with the letter R​?

• The plant has matured and will begin to flower soon.

• Seeds are produced in the fruit for for reproduction.

• The seedling is beginning to develop into a mature plant.

• The plant is beginning to germinate as it grows from the seed.

As part of her class’s investigation into plant growth and development, Samantha is

collecting data from the plants her class is growing. As part of her observations, she

makes note of the following:

● The plant has a stem with several branches growing out from it.

● There are many leaves on each branch.

● Flower buds are beginning to grow on the ends of the stems.

● The leaves look green and healthy.

​Based on the student’s observations, what stage of development is she observing?

• germination

• mature plant

• seed

• seedling

​Leaf shape, type of fruit, and the flower color are all examples of plant characteristics that are ________

• part of the plant’s life cycle

• sources of food for animals

• inherited from the parent plant

• influenced by the environment

​Why do some plants produce fruit that contain seeds?

• The fruit protects the seeds from animals that would eat them.

• The fruit is eaten by animals who then spread the seeds through their droppings.

• The seeds grow into seedlings within the fruit before being carried away by animals.

• The seeds remain inside the fruit until it rots, then they can be carried away by the wind.

The Saguaro Cactus lives in the deserts of Arizona, southern California, and parts of

northern Mexico. They can grow to a height of over 70 feet and are covered in spines.

The roots of the Saguaro Cactus are shallow, only 4 to 6 inches deep and can spread

out as wide and the cactus is tall. Many desert bird species make holes in these cacti in

order to build their nests. The Saguaro cactus produces flowers in the spring that attract

bees, doves, and bats, who act as pollinators for the plant. ​The roots of the Saguaro Cactus are shallow and widely spread because ________ .

• they need to absorb rainwater quickly before it evaporates

• they prevent tall cactus from falling over in the strong desert wind

• they can stabilize the cactus when birds dig holes in it to make nests

• they cannot penetrate the hard desert rocks that lie just below the sand

​Which of the following adaptations best​ explains how pine trees are able to prevent

water loss or damage from freezing temperatures?

• Pine trees have thick bark.

• Pinecones produce seeds.

• Pine tree roots go deep underground.

• Pine needles are thin and have a wax coating.

What would happen to a plant if it was turned away from its light source?

• the plant would stop growing
• the plant would by unaffected
• the plant would move away from the light source
• the plant would bend towards the light