Transport in plants — IGCSE Biology (0610) questions by topic

The roots of a plant are cut off and the stem is placed in a beaker containing a liquid red stain. After a few hours, in which part of the plant stem will the red stain be…

The diagram shows the movement of water molecules from a plant leaf to its environment. Two processes are numbered with arrows: process 1 is an arrow showing water moving within…

What is the pathway taken by water through a plant? A root cortex cells → root hair cells → mesophyll cells → xylem B root cortex cells → root hair cells → xylem → mesophyll cells…

Which graph shows the effect of humidity in the air on the rate of transpiration in a plant? Four graphs of rate of transpiration (y-axis) against percentage humidity (x-axis, 0…

In some countries, spring is the time of year when daffodil plants have green leaves and produce flowers. Which parts of the daffodil plants act as sources and sinks in spring?…

Which row shows the features of xylem vessels? vessel walls mitochondria present --- --- --- A thick yes B thick no C thin yes D thin no

A student wanted to investigate the effect of humidity on transpiration. She set up two sets of apparatus with identical-sized plants of the same species. Tube X holds a plant…

The diagrams show cross-sections of a leaf, a root and a stem. [Diagrams (not to scale): leaf cross-section with 1 pointing to the upper tissue and 2 pointing to a vascular bundle…

Fig. 2.1 is a diagram of a cross-section of a root. State the letter in Fig. 2.1 that shows: a tissue that transports amino acids ........................................ xylem…

Fig. 5.1 is a diagram of a plant root hair cell. The diagram shows an elongated root hair cell with a key indicating nitrate ions (shown as crosses) and water molecules (shown as…

Fig. 3.1 is a photomicrograph of a section through the stem of a plant. Use a label line and label to identify and name a structure that transports sucrose in Fig. 3.1.

Water moves from the soil to a leaf. Using words from the list, complete the flowchart by writing the names of the structures in the correct order in the spaces provided. The…

Fig. 5.1 is a graph showing the effect of temperature on the rate of transpiration from the upper and lower surfaces of a leaf that is provided with a constant supply of water.…

What is a description of transpiration? A the breakdown of nutrient molecules to release energy B the flow of energy through living organisms C the loss of water vapour from…

Which row describes transport in a plant? (columns: transport tissue; transport tissue found in a vascular bundle; substances transported) A phloem; yes; sucrose and amino acids B…

Which statement about plant support is correct? A The pressure of water inside the cells presses inwards on the cell walls. B The pressure of water inside the cells presses…

The diagram shows a cross-section of a stem with structures labelled R and S. Which statement correctly describes the location and function of phloem? A Structure R is phloem and…

Some environmental factors are listed: 1 carbon dioxide concentration; 2 temperature; 3 oxygen concentration; 4 wind speed. Which factors directly affect the rate of…

The diagram shows the pathway of water molecules through a leaf and out to the environment: mesophyll cell - process X - air space - process Y - stomata. Which statements are…

Which substance strengthens the walls of xylem vessels? A glycerol B glycogen C lignin D starch

Which row explains why a plant wilts? (columns: water loss at the leaf surface; water uptake in the roots; state of the plant cells) A low; high; flaccid B low; high; turgid C…

Scientists investigated the movement of sucrose through a plant using carbon dioxide containing radioactive carbon, 14C. They covered one leaf on a plant with a clear plastic bag…

Which conditions lead to the lowest rate of transpiration in a plant? A cool and high humidity B cool and windy C warm and low humidity D warm and windy

The table shows the transport tissues of plants and some substances that may or may not travel through these tissues. Which row is correct for translocation? (columns: plant…

A student set up the experiment shown (a potometer with a leafy shoot, reservoir of water, scale, capillary tube and air bubble) on a hot and dry day. The air bubble moved towards…

Which statement describes the process of translocation? A the movement of sucrose and amino acids in the xylem from the source to the sink B the movement of sucrose and water in…

A student investigated the effect of windspeed on the rate of transpiration. The student placed a fan at different distances from a plant shoot and measured the distance the air…

In plants, water moves up the stem in xylem vessels as a column of water molecules as a result of transpiration. A celery stalk that still has its leaves attached can be used to…

In plants, water moves up the stem in xylem vessels as a column of water molecules as a result of transpiration. A celery stalk that still has its leaves attached can be used to…

Which row shows the functions of xylem and phloem? Columns: transports amino acids; transports mineral ions; transports sucrose. A phloem; xylem; phloem B xylem; xylem; phloem C…

What is the effect on a plant of not having any root hairs? A The plant absorbs less water from the soil. B The plant absorbs more water from the soil. C The plant loses water to…

Which pathway is taken by water through a plant? A root hair → root cortex → xylem → mesophyll → stomata B root hair → xylem → mesophyll → root cortex → stomata C stomata → root…

Which row shows the transpiration rate for the conditions described? Columns: wind speed; atmospheric temperature; transpiration rate. A low; low; fast B high; high; slow C low;…

A stem was cut from a plant. The base of the stem was placed into a beaker containing water and a red stain for two hours. The diagram shows a cross-section of the plant stem,…

Which pair of processes causes transpiration in plant leaves? Columns: at the surface of mesophyll cells; through the stomata. A absorption of water; evaporation of water B…

Which statement describes the effect of atmospheric humidity on the rate of transpiration? A In high humidity, the transpiration rate is high because there is slow diffusion of…

Sucrose and amino acids move around a plant from sources to sinks. Which row shows the sources and sinks? Columns: root cortex cells; xylem vessels; palisade mesophyll cells. A…

Humidity and wind speed are two factors that affect the rate of transpiration. How do these two factors affect the concentration gradient of water molecules between the inside of…

During an investigation into the movement of substances in a plant, a ring of tissue containing the outer part of the transport tissue (epidermis and phloem) is removed, as shown.…

Which combination of environmental factors will cause the largest increase in the transpiration rate in a plant? Columns: wind speed; humidity; temperature; light intensity. A…

The diagrams represent the movement of substances between plant cells through the phloem; the arrows indicate the direction the substance is moving in, between a source and a…

Fig. 4.1 is a diagram of a cross-section of a root, with a tissue labelled X (the central vascular tissue, including phloem). Circle two substances transported by the part…

Transpiration is the loss of water vapour from the leaves of a plant. Complete the sentence describing transpiration. Water evaporates from the surfaces of the ......... cells…

What is a description of transpiration? A exchange of gases between the leaf and the atmosphere B loss of water vapour from the leaves of a plant C movement of water from the…

Parts of a plant are listed. 1 mesophyll cells 2 root cortex cells 3 root hair cells 4 xylem vessels What is the pathway taken by water in the plant? A 1→4→2→3 B 1→2→3→4 C 3→1→4→2…

From which part of a leaf does most water evaporate during transpiration? A the cuticle B the guard cells C the spongy mesophyll cells D the xylem vessels

The photograph shows a cross-section through a sunflower stem, with a tissue labelled Z. What is the name and function of the tissue labelled Z? Columns: name of tissue; function…

Scientists studied the uptake of potassium ions from chemical fertilisers by wheat plants (Fig. shows potassium uptake / kg per hectare against days after planting, 0–420). What…

By which process is water vapour lost from a leaf? A active transport B diffusion C osmosis D photosynthesis

The pathway taken by water through a plant is shown: root hair cells → root cortex cells → Z → mesophyll cells. Which part of the pathway is Z? A palisade cells B phloem C stomata…

What is a description of transpiration? A exchange of gases between the leaf and the atmosphere B loss of water vapour from the leaves of a plant C movement of water from the…

Parts of a plant are listed. 1 mesophyll cells 2 root cortex cells 3 root hair cells 4 xylem vessels What is the pathway taken by water in the plant? A 1→4→2→3 B 1→2→3→4 C 3→1→4→2…

From which part of a leaf does most water evaporate during transpiration? A the cuticle B the guard cells C the spongy mesophyll cells D the xylem vessels

The photograph shows a cross-section through a sunflower stem, with a tissue labelled Z. What is the name and function of the tissue labelled Z? Columns: name of tissue; function…

During growth, potato plants produce flowers and underground storage organs called tubers. During this time, which parts of the plant act as sources and sinks for translocation?…

By which process is water vapour lost from a leaf? A active transport B diffusion C osmosis D photosynthesis

The pathway taken by water through a plant is shown: root hair cells → root cortex cells → Z → mesophyll cells. Which part of the pathway is Z? A palisade cells B phloem C stomata…

Complete the sentences about transpiration using words from the list. Each word may be used once or not at all. List: decomposition, evaporation, mesophyll, phloem, root hair…

Fig. 6.1 is a diagram showing the pathway of water into a plant. The arrows show the direction of water movement, from soil particle and soil water, through cells A and B, into…