Sapling Ch. 8

Classify each description that applies to autotrophs.

• producers

• obtain their food by consuming other organisms

• use photosynthesis to produce organic compounds

• use inorganic materials to produce energy

• synthesize their own food

Which description(s) describe heterotrophs?

• make their own food

• rely on other organisms for energy

• obtain food by consuming other organisms

• unable to produce organic compounds from inorganic material

• consumers

Plants synthesize their own food in the form of sugars during the process of photosynthesis. Which of the following statements describe photosynthesis?

• uses sugars to generate cellular energy, releasing carbon dioxide

• converts carbon dioxide to sugars, releasing oxygen

• is a cellular process that occurs in the mitochondria of plant cells

• is a cellular process that occurs in the chloroplast of plant cells

• produces sugars for the plant using the energy from sunlight

What is the correct equation for photosynthesis?

• 6O2+6H20 >>light>> C6H12O6+6CO2

• 6CO2+6H2O >>light>> C6H12O6+6O2

• 6CO2+6O2 >>light>> C6H12O6+6H20

Which statements describe characteristics of stomata in plants?

• permit CO2 to enter and O to escape from a plant

• carry out photosynthesis in plants

• are tubes composed of cells that extend from plant roots to the leaves

• are pores enclosed by guard cells that are located on the plant's surfaces

What are the components of a chloroplast? (make sure you know where these are located for the test)

• thylakoid

• stomata

• granum

• triple membrane

• stroma

Which statement describes the function of photosynthetic pigments in leaves?

• they capture light energy and remove electrons from a donor

• they convert energy from sunlight to energy in simple sugars

• they allow CO2 to enter into the plant through the stomata

Why do most plant leaves appear green?

• cause of the way it is

• pigments in plant cells absorb blue and red light, but much of the green light is reflected

• carotenoid pigments in plant organelles reflect green wavelengths of light

• xanthophyll reflects yellow light

During photosynthesis, specific pigments absorb light energy, which is then used to fuel the building of sugar molecules. Which colors correspond to the wavelengths of light that are strongly absorbed by each pigment?

• carotenoids: violet-blue

• chlorophyll b: violet-blue, orange-red

• chlorophyll a: violet blue, orange-red

• chlorophyll a: orange-red only

• carotenoids: orange-red, violet-blue

What is needed for the light-dependent reactions of photosynthesis to take place?

• light

• water molecules

• carbon dioxide

• chlorophyll

• sugar