Plant Biology Concepts and Functions

What are the main functions of xylem and phloem in vascular plants?

• Xylem transports food, phloem transports water.

• Xylem transports water, phloem transports food.

• Both xylem and phloem transport water.

• Both xylem and phloem transport food.

Which of the following is a characteristic of nonvascular plants?

• They have true stems, leaves, and roots.

• They are typically large, like trees.

• They absorb water through osmosis.

• They transport water and nutrients using xylem and phloem.

Which type of vascular plant is characterized by "naked seeds" and typically has cones instead of flowers or fruits?

• Seedless Vascular Plants

• Angiosperms

• Bryophytes

• Gymnosperms

What percentage of all plants are estimated to be angiosperms, making them the largest and most diverse group?

• Approximately 10%

• Approximately 50%

• Approximately 90%

• Approximately 75%

What are the three main ingredients plants need for photosynthesis?

• Water, Oxygen, and Light

• Water, Carbon Dioxide, and Light

• Glucose, Oxygen, and Water

• Carbon Dioxide, Glucose, and Light

What are the small openings on plant leaves that allow for gas exchange called?

• Chloroplasts

• Guard cells

• Stomata

• Cuticles

Which of the following is an adaptation that helps plants conserve water in dry environments?

• Broad, wide leaves

• Thin, needle-like leaves

• Increased chlorophyll production

• Opening stomata during the day

Why do carnivorous plants like the Venus Fly Trap digest insects?

• To get extra sugar for photosynthesis.

• To supplement their nitrogen needs from low-nitrogen soil.

• To protect themselves from pests.

• To absorb more light energy.