Organisation of the organism

In a plant, what is formed by a group of xylem vessels?

• a cell

• a tissue

• an organ

• an organ system

What are the functions of xylem vessels?

• absorption

• conduction

• photosynthesis

• support

The diagram shows a palisade mesophyll cell.

Which structure is not found in an animal cell?

• A

• B

• C

• D

Which statement is correct for phloem but not for xylem?

• It carries mineral ions.

• It carries starch.

• It carries sucrose.

• It is no longer living.

What is the correct order of increasing size of the following structures, from smallest to largest?

• chromosome → liver → white blood cell

• chromosome → white blood cell → liver

• liver → chromosome → white blood cell

• white blood cell → liver → chromosome

A palisade cell and a nerve cell are observed under a light microscope.

Only the palisade cell has a :

• cell membrane.

• cytoplasm.

• nucleus.

• vacuole.

Which of the following is true for root hair cell?

• allows water to pass into the plant

• increases the surface area of the root

• loses water by transpiration

At which level of organisation is a root?

• organ

• organ system

• organism

• tissue

Which description of the heart is correct?

• The heart is an organ, containing several systems, which forms part of the circulatory tissue.

• The heart is an organ, containing several tissues, which forms part of the circulatory system.

• The heart is a system, containing several organs, which forms part of the circulatory tissue.

• The heart is a system, containing several tissues, which forms part of the circulatory organ.

Which is not an organ?

• blood

• heart

• tooth

• vein