Title: Unit 2 Quiz
Course: HRT 125 Plants and Society > Section: HRT 125 Plants and Society

Q: Which is true of cells?
- Cells are the basic unit of life.
- All organisms are made from them.
- A new cell arises from a pre-existing cell.
- All of the above.
A: All of the above.

Q: Plants cells _____.
- contain a central vacuole
- have cell walls made of cellulose
- may contain chloroplasts
- all of the above
A: all of the above

Q: Photosynthesis _____.
- is common to all living things
- converts CO2, water and sunlight to sugar
- creates carbon dioxide and water from sugar
- is not an important process to most plants
A: converts CO2, water and sunlight to sugar

Q: The central vacuole _____.
- is made from a group of specialized cells
- has no function that scientists have yet identified
- stores raw materials a plant may use, among other things
- is only found in animal cells, not plant cells
A: stores raw materials a plant may use, among other things

Q: Chloroplasts _____.
- are the sites of photosynthesis in plants
- contain pigments such as carotenoids that give some structures bright colors
- become visible in fall as the chromoplasts shrink
- are the "powerhouses" of the cell
A: are the sites of photosynthesis in plants

Q: Mitochondria _____.
- produce ATP
- reproduce by binary fission
- are believed to be descended from ancient bacteria that were enveloped by a larger cell
- all of the above
A: all of the above

Q: Xylem _____.
- carry water and raw materials up to the leaves
- carry sugars and proteins down from the leaves
- is always composed of living cells
- none of the above
A: carry water and raw materials up to the leaves

Q: Phloem _____.
- carries water and raw materials up to the leaves
- carries sugars and proteins down from the leaves
- can be composed of dead cells
- none of the above
A: carries sugars and proteins down from the leaves

Q: Flowers _____.
- are sites of asexual reproduction
- exist only in gymnosperms
- exist only in angiosperms
- always contain both male and female parts
A: exist only in angiosperms

Q: A fruit _____.
- is the results of sexual reproduction
- is a ripened ovary
- can contain one or more seeds
- all of the above
A: all of the above