BJU Biology Chapter 15 Plant Processes

For what purpose is water NOT used in plants

• transporting minerals and nutrients

• maintaining turgor pressure

• carrying on photosynthesis

• providing energy storage

How does a light source cause a plant to grow toward the light?

• Light increases the concentration of growth inhibitor on the light side of the plant

• Light increases the concentration of auxins on the light side of the plant

• Light decreases the concentration of auxins on the light side of the plant

• Light causes the plant to stop producing auxins

A gardener trains a cucumber vine to climb a trellis. Which kind of tropism makes this possible?

• gravitropism

• phototropism

• thigmotropism

• hydrotropism

Which group of chemicals is largely responsible for photoperiodism?

• auxins

• phytochromes

• gibberellins

• cytokinins

Spider plants (Chlorophytum comosum) are house plants that send out runners, specialized stem structures that grow along the surface of the ground or just below it and produce new platelets. The botanical term for this structure is ___.

• corn

• tuber

• stolon

• scion

Which of the following is NOT an important role of plants in the environment?

• reducing local temperatures

• decomposing organic matter

• filtering water before it enters into aquifers

• holding soil in place

The property of water that allows the molecules to stick to each other

Plant growth is controlled by messenger molecules called ___.

A plant growing toward a light source is exhibiting ___

Plants that bloom without regard to day length are known as __ -___ plants.