Plant Structures & Reproduction

Terrestrial plants have stomata on the surface of their leaves. Stomata are surrounded by two guard cells that change shape in response to environmental factors and open or close the stoma. Which of the following best explains how the structure of the leaf is used in processes that occur in plants?

• Water enters the plant through the surface of the leaf for transpiration

• Carbon dioxide enters the plant through the surface of the leaf for cellular reproduction

• Gases for photosynthesis are exchanged through the surface of the leaf

• Energy for cellular reproduction is absorbed through the surface of the leaf

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Plant cells that are specialized for cell division are most likely found in what part of the plant?

•  root tips
•  leaf epidermis
• stem epidermis
• vascular tissue

If the xylem in a young tree is damaged, which process is first affected?

• performing photosynthesis

• transporting nutrients to the leaves

• transporting water to the leaves

• absorbing water from the soil

A plant species lives in an area with limited sunlight. Which physiological adaptation would be most useful to the plant?

• colorful flowers
•  large leaves
•  deep roots
•  thin cuticle

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

The cambuim is a section of cells in a plant that can become either part of the xylem or phloem, depending on the growth and needs of the plant. If the cambium of a particular plant was damaged, what would be the most likely effect on the plant?

•  The plant would lose its ability to carry out photosynthesis.
•  The plant would have uncontrolled growth.
•  The plant would not experience any change in physiology.
•  The plant would not be able to transport nutrients and water

Tags

NGSS.HS-LS2-3

Which structure in the leaf controls the opening and closing of the stoma?

•  cuticle
• epidermis
• guard cell
• spongy mesophyll

Which statement describes the role of flowers in plant survival?

• Flowers can absorb carbon dioxide for sugar production.

• Flowers produce oxygen through cellular respiration.

• Flowers contain cells that carry out photosynthesis.

• Flowers contain cells that produce gametes. (sex cells)

Tags

NGSS.MS-LS1-4

What is the main purpose of seeds in plants that have them?

•  To protect and distribute the zygote.
•  To entice animals to eat the plant.
•  To be fertilized by other plants.
• To store water for the mother plant.

The diagram represents a flower, the reproductive structure of some plants. Most flowers have both male and female structures for fertilization and reproduction. Which structure is represented by the letter A in the diagram?

•  the stamen, a male structure which produces pollen
• the pistil, a female structure which collects pollen and passes it to the ovary
•  the sepal, a modified leaf used for protection of the flower
•  the petals, decorative structures which attract pollinators

Tags

NGSS.MS-LS1-4

Pollen is produced in the --

• pistil

• stamen

• ovary

• petal