lesson 4 topic 1

Chemicals that affect growth and development.

• hormones

• dormancy

• auxin

• tropism

hormone that speeds up the rate at which plant cells grow and controls a plant's response to light.

• hormones

• dormancy

• auxin

• tropism

A plant's growth response toward or away from a stimulus is called?

• hormones

• dormancy

• auxin

• tropism

A plant's response to seasonal changes in the length of night and day is called?

• photoperiodism

• dormancy

• auxin

• tropism

A period when an organism's growth or activity stops.

• photoperiodism

• dormancy

• auxin

• tropism

Major body changes, as they grow and develop into adults.

• essential

• stimuli

• metamorphosis

• dormancy

While out hiking in the woods, Ian sees several wild grapevines wrapped around some tree trunks and branches. He notices the broad leaves and curling, forking tendrils of the vines that loop around the tree branches. This makes him think about the factors that influence the way things grow. Which factors contribute to the way organisms grow and develop? Choose the three that apply.

• genetics

• size

• response to stimuli

• structures

• access to resources

Vivienne visits a botanical garden in a nearby city and sees a plant commonly called Touch-Me-Not. She touches the tip of the leaf of this plant, known as Mimosa pudica, with her finger and watches the leaves close. She later learns that chemicals trigger this reaction.

Plants respond to stimuli in different ways.

Stems is an example of?

• positive gravitropism

• negative gravitropism

• thigmotropism

• phototropism

Vivienne visits a botanical garden in a nearby city and sees a plant commonly called Touch-Me-Not. She touches the tip of the leaf of this plant, known as Mimosa pudica, with her finger and watches the leaves close. She later learns that chemicals trigger this reaction.

Plants respond to stimuli in different ways.

Roots is an example of?

• positive gravitropism

• negative gravitropism

• thigmotropism

• phototropism

Vivienne visits a botanical garden in a nearby city and sees a plant commonly called Touch-Me-Not. She touches the tip of the leaf of this plant, known as Mimosa pudica, with her finger and watches the leaves close. She later learns that chemicals trigger this reaction.

Plants respond to stimuli in different ways.

Coils around any object it touches is an example of?

• positive gravitropism

• negative gravitropism

• thigmotropism

• phototropism