Ch20
Particles made up of proteins, nucleic acids, and sometimes lipids that can reproduce only by infecting living cells are called
a. bacteria
b. capsids
c. prophages
d. viruses
d. viruses
1. Which of the following descriptions applies to most protists?
a. unicellular prokaryotes
b. multicellular prokaryotes
c. unicellular eukaryotes
d. multicellular eukaryotes
c. unicellular eukaryotes
1. Which of the following is NOT a characteristic of plants?
a. eukaryotic cells
b. cell walls containing chitin
c. multicellular structure
d. chlorophyll
b. cell walls containing chitin
1. The plant organ that supports the plant body and carries nutrients between different parts of the plant is the
a. root.
b. stem.
c. leaf.
d. flower.
B.stem
1. In angiosperms, the structures that produce the male gametophyte are called the
a. anthers.
b. sepals.
c. pollen tubes.
d. stigmas.
a. anthers.
One group of viruses that contain RNA as their genetic information is the
a. bacteriophages
b. retroviruses
c. capsids
d. prophages
b. retroviruses
10. Alternation of generations is the process of alternating between
a. mitosis and meiosis
b. asexual and sexual reproduction
c. male and female reproductive structures
d. diploid and haploid phases.
d. diploid and haploid phases.
2. The first land plants likely evolved from
a. protists
b. green algae.
c. mosses
d. red algae
b. mosses.
3. Tracheids and vessel elements make up
a. phloem.
b. trichomes.
c. xylem.
d. meristem.
c. xylem.
2. Pollination occurs when pollen lands on
a. the style.
b. the stigma.
c. the filament.
d. the anther.
b. the stigma.
Prokaryotes are unlike all other organisms in that their cells
a. lack nuclei.
b. have organelles
c. have cell walls
d. lack nucleic acids
a. Lack nuclei
Which is NOT true of amoebas?
a. They reproduce by mitosis
b. They move using pseudopods
c. They have a rigid cell membrane.
d. The protein actin powers their movement
c. They have a rigid cell membrane.
3. Two gases that plants must exchange are
a. oxygen and nitrogen
b. carbon dioxide and nitrogen
c. oxygen and carbon dioxide.
d. carbon dioxide and carbon monoxide
c. oxygen and nitrogen.
4. Phloem functions primarily in
a. transport of water.
b. growth of the root.
c. transport of products of photosynthesis.
d. increasing stem width.
c. transport of products of photosynthesis.
The process in which a single plant produces many offspring genetically identical to itself is
a. sexual reproduction.
b. agriculture.
c. dormancy.
d. vegetative reproduction.
d. vegetative reproduction.
Prokaryotes that thrive in oxygen-free environments are called
a. aerobes
b. retroviruses
c. anaerobes
C. Anaerobes
16. Slime molds are found primarily in
a. oceans
b. decaying organic matter.
c. fast-moving streams
d. deserts
b. decaying organic matter.
4. Recent changes in the classification of the plant kingdom are based on
a. studies comparing DNA sequences.
b. comparison of physical structures
c. differences and similarities in life cycles
d. whether or not a plant uses seeds to reproduce
a. studies comparing DNA sequences.
9. Which of the following are found in roots?
a. vascular tissue only
b. ground tissue only
c. dermal and vascular tissue only
d. dermal, vascular, and ground tissue
d. dermal, vascular, and ground tissue
16. Substances that stimulate cell division and cause dormant seeds to sprout are
a. gibberellins.
b. auxins.
c. cytokinins.
d. phytochromes.
a. gibberellins.
Prokaryotes reproduce asexually by
a. binary fission.
b. endospores
c. conjugation
d. mutation
a. binary fission.
15. Which of the following statements about photosynthetic protists is most accurate?
a. Most photosynthetic protists are heterotrophs
b. All photosynthetic protists are closely related to plants
c. Small photosynthetic organisms near the ocean's surface are called phytoplankton.
c. Small photosynthetic organisms near the ocean's surface are called phytoplankton.
9. Under unfavorable conditions, the green alga Chlamydomonas reproduces by forming
a. haploid zygote
b. multicellular sporophyte
c. diploid zygote.
d. multicellular gametophyte
c. diploid zygote.
10. As a growing root pushes through the soil, the delicate apical meristem is protected by
a. a root cap.
b. xylem.
c. bark.
d. root hairs.
a. a root cap.
17. Photoperiod is a measurement of
a. water level.
b. day length.
c. gravity.
d. nutrients
b. day length.