Chapter 7 photosynthesis

What is the name given to organisms that can make their own food and thus sustain themselves

without consuming organic molecules derived from other organisms?

• chemotrophs

• heterotrophs

• synthesizers

• autotrophs

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Photoautotrophs

• make sugar by using organic raw materials

• produce organic molecules from inorganic molecules

• eat other organisms that use light energy to make food molecule

• include only the green plants

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Which of the following is an example of a photoautotroph?

• cyanobacteria in freshwater and marine ecosystems

• grizzly bears in Alaska

• bacteria in our mouth

• mushrooms growing on the side of a dead tree

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Autotrophs that utilize light as their energy source are

• chemosynthetic autotrophs

• photoautotrophs

• fungi

• heterotrophs

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What is the likely origin of chloroplasts?

• mitochondria that had a mutation for photosynthesis

• photosynthetic prokaryotes that lived inside eukaryotic cells

• prokaryotes with photosynthetic mitochondria

• eukaryotes that engulfed photosynthetic fungi

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In most green plants, chloroplasts are

• concentrated in a zone of leaf tissue called the mesophyll

• concentrated in a portion of the leaf called the stroma

• evenly distributed throughout the leaf tissue

• evenly distributed throughout the entire plant.

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________ cells in leaves are specialized for photosynthesis

• Companion

• Mesophyll

• Sclerenchyma

• Tracheid

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CO2 enters and O2 escapes from a leaf via

• stomata

• thylakoids

• grana

• stroma

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In the chloroplast, sugars are made in a compartment that is filled with a thick fluid called the

• stomata

• thylakoid

• matrix

• stroma

Chloroplasts contain disklike membranous sacs arranged in stacks calle

• cristae.

• thylakoids

• grana

• vacuoles