Plant Structures

Choose the answer that best completes the sentence: A scientist examining a fossilized plant explains that, based on his observations, the plant was no more than a few centimeters tall when it was alive. This explanation would be most strengthened by the scientist's observation that the plant lacked compound leaves, vascular tissue, colored flowers, chloroplasts.

• lacked compound leaves

• lacked vascular tissue

• lacked colored flowers

• lacked chloroplasts

Transpiration is a process that involves the loss of water through the stomata of plants. In the diagram of a plant below, choose THE structure where transpiration would occur by clicking the appropriate circle.

• Roots

• Stems

• Leaves

• Flowers

Why are root hairs such an important feature in the root system?

• Root hairs have no affect on the surface area of the root system but do help with the absorption of nutrients.

• Root hairs increase the surface area of the root system but do not assist with the absorption of nutrients.

• Root hairs increase the surface area of the root system as well as assist with the absorption of nutrients.

• Root hairs have no affect on the surface area of the root system and also do not help with the absorption of nutrients.

Nutrients that are absorbed by the plant roots from the soil are transported by what system?

• vascular system

• transpiration system

• phloem system

• plant reproductive system

Which of the following is NOT a growth response of a plant?

• response to light (phototropism)

• response to gravity (gravitotropism)

• response to touch (thigmotropism)

• response to smell (odotropism)

Students place a plant in a dark, windowless closet for two days. Which of these will help the plant maintain homeostasis?

• growing deeper roots

• using stored sugars

• decreasing stem size

• losing all of its leaves

All of the following organelles would be found in a root cell of a plant except —

• A. cell wall

• B. chloroplast

• C. nucleus

• D. vacuole

Which of the following is the function of the guard cells on the lower surface of the leaf?

• synthesizing proteins

• transporting water and minerals

• opening and closing stomata

• allowing light to enter the leaf

The plant structure that transports water and minerals up from the roots is –

• xylem

• phloem

• cuticle

• stomata

Which animal system has a function similar to the function of the plant system shown in the diagram?

• A. excretory

• B. circulatory

• C. nervous

• D. respiratory