Fifth Form Review - Part 1

Which one of the following describes movement in plants?

• irreversible whole or part movement

• reversible whole or part movement

• irreversible growth or part movement

• reversible growth or part movement

Locomotion is an evolutionary adaptation performed by animals. What advantages does this mechanism have over the type of movement that occurs in plants?

I The ability to move to favourable conditions

II Increases chances of predator attcaks

III The ability to find food

• I and II only

• I and III only

• II and III only

• I, II and III

In humans the skeletal system performs a variety of functions including

• blood cell formation

• hormone formation

• immnune response

• mastication

Which of the following is least likely to be a growth movement in a plant?

• closing the leaves of a sensitive plant

• the downward movement of the roots in soil

• the crawling movement of runners like grasses

• the upward movement of a vine on a rod

Which of the following statements about the skeletal system is NOT correct?

• it protects delicate organs such as theheart and lungs

• it is made up of hard non-living tissue

• it produces red and white blood cells

• it gives the body its shape

The diagram shows the arm flexing. Which of the following occurs when the arm is flexed?

• muscle X contracts while muscle Y relaxes

• muscle X contracts while muscle Y contracts

• muscle X relaxes while muscle Y relaxes

• muscle X relaxes while muscle y contracts

A detectable change in the internal or external environment of an organism is called

• a stimulus

• a response

• a receptor

• an effector

An organism's reactions to a change in its environment is called

• a stimulus

• a response

• a receptor

• an effector

The role of the effector is to

• detect stimulus

• respond to stimulus

• create nerve impulse

• relay a nerve impulse

The diagram below shows four conditions set up in an experiment. After a few days, the TALLEST shot would most likely be

• I

• II

• III

• IV

Answer explanation

Lack of sufficient light retards chlorophyll formation and promotes rapid slender growth, thus leading to pale green leaves, spindly growth, and premature drop of leaves and flowers. This condition is known as etiolation.