Worksheetsch.7 Flowering Plants: Nutrition and Transport
Total questions: 40
Worksheet time: 20mins
Which structure allows carbon dioxide to enter plant leaves?
Xylem
Phloem
Stomata
Guard Cells
What is the primary function of xylem in vascular plants?
Transport of sugars and nutrients
Transport of water and minerals
Gas exchange
Support for photosynthesis
Tracheids and vessel elements are types of cells found in which plant tissue?
Which property of water contributes to its movement through xylem vessels?
Its ability to be stored as ice
Hydrogen bonding
Low boiling point
Nonpolarity
What is the term for the process of water evaporation from plant leaves?
The cohesion-tension model describes how water moves in the xylem. Which part of this model explains how water molecules are pulled upwards?
Cohesion and adhesion
Root pressure
Gravity
Evaporation at the roots
Root pressure causes water to be pushed upwards in plants. Which phenomenon is directly caused by root pressure?
What enables sieve-tube members in the phloem to transport organic nutrients?
Sieve plates with pores
Which cells in the phloem support sieve-tube members by providing proteins?
Why do stomata close when a plant is under water stress?
Which process allows potassium ions (K⁺) to enter guard cells, leading to stomatal opening?
Which pigment regulates the opening and closing of stomata in response to blue light?
Flavin
Which concept explains water movement from high to low water potential?
Osmosis (Water potential)
Phloem tissue moves organic nutrients to areas of the plant where they are needed. What are these areas called?
What role does the waxy cuticle on the leaves play in a plant?
helps reduce water loss and protects the plant.
absorbs sunlight for photosynthesis.
helps in nutrient absorption from the soil.
allows for gas exchange in the leaves.
What allows water to stick to the walls of xylem vessels?
Absorption
Cohesion
Evaporation
Adhesion
Which process in plants allows for the passive upward movement of water through xylem?
Cohesion-tension mechanism
Active transport
Cellular respiration
What effect does abscisic acid (ABA) have on stomata?
Which of the following best describes how water is transported from roots to leaves?
Circadian rhythms in plants can influence which process?
Photosynthesis
In pathway A, where does water flow before entering endodermal cells?
Through plasmodesmata
Through the Casparian strip
Between porous cell walls
Directly into xylem
What is the function of the Casparian strip?
It allows water to flow freely
It prevents mineral loss
It blocks water entry into endodermal cells via cell walls
It assists in mineral uptake
Which pathway involves water traveling through plasmodesmata?
Pathway A
Pathway B
By what process does water enter root cells when the soil solution has higher water potential than root tissues?
Which type of transport moves minerals against their concentration gradient into root cells?
How do negatively charged ions such as nitrate (NO₃⁻) cross the plasma membrane?
Through active pumping
By co-transport with hydrogen ions
Directly through channel proteins
Through osmotic pressure
Which structure establishes the electrochemical gradient needed for mineral uptake?
How does the proton pump aid in the uptake of potassium ions (K⁺)?
It creates an electrochemical gradient
It hydrolyzes potassium ions
It removes K⁺ from cells
It decreases water potential
Which mutualistic relationship involves fungi that enhance water and mineral uptake?
Root nodules primarily assist plants in obtaining which nutrient?
What adaptation allows nitrogen-fixing bacteria to survive in root nodules?
High levels of oxygen
Increased light exposure
Casparian strip
Anaerobic environment
Which type of plants use haustoria to extract nutrients from a host?
Which mineral is transported as an ion and concentrated in roots up to 10,000 times the soil concentration?
Minerals
How does mycorrhizae benefit the fungus involved in the mutualistic relationship with plants?
Fungi provide essential sugars
Fungi provide water
Fungi remove toxic substances
Fungi increase nutrient absorption
Which ions are typically absorbed by plants as nutrients?
How do carnivorous plants obtain additional nitrogen?
What mechanism prevents mineral ions from diffusing back into the soil?
Root nodules
Proton pump
Plasmodesmata
Casparian strip
Which adaptation is common among plants in nutrient-poor environments to increase nutrient absorption?
Root nodules
Symbiosis with nitrogen-fixing bacteria
Mycorrhizae
All of the above
Which term describes plants like the Venus flytrap, which supplement their nitrogen intake by digesting prey?
Which of the following statements best describes the role of the Casparian strip in root mineral uptake?
It allows water and minerals to pass freely into the root cortex.
It prevents backflow of water from the xylem to the root cells.
It forces water and minerals to enter endodermal cells through the plasma membrane.
It serves as a storage site for excess minerals in the roots.
