Q&A Hero

Q: The following questions refer to the figure above of the life cycle of a pine. Meiosis that produces microspores is indicated by a. A. b. B. c. C. d. D. e. E.

Q: What occurs within the female cone of a pine tree? a. meiosis b. mitosis c. development d. fertilization e. all of these

Q: In conifers, the time between pollination and fertilization is a. just a few hours. b. about a day. c. about a month. d. about six months. e. a year or more.

Q: Which of the following plants are widely planted in cities because of their resistance to insect predators, air pollution, and disease? a. horsetails b. ginkgos c. pines d. spruces e. junipers

Q: Which of the following is NOT true concerning conifers? a. They form seeds in female cones. b. They have needlelike and scale-like leaves. c. They have a thick cuticle. d. They have motile sperm. e. They are mostly evergreen.

Q: The above figure representsa. petunia eggs.b. pine pollen.c. pansy spores.d. petal fragments.e. poppy seeds.

Q: The seed develops from thea. gametophyte.b. ovary.c. ovule.d. pollen grain.e. zygote.

Q: The male gametophytes are a. ovules. b. seeds. c. pollen grains. d. cones. e. sperm cells.

Q: Sperm swim from ____ to ____ for fertilization. a. B; A b. D; C c. D; E d. C; D e. E; C

Q: The entire structure indicated by "C" is a ____ gametophyte. a. moss b. liverwort c. hornwort d. fern e. gymnosperm

Q: A sorus is a. a fern spore. b. the fern gametophyte. c. an egg-producing structure. d. where the sperm are produced. e. a collection of sporangia.

Q: Which of the following statements concerning fertilization in ferns is true? a. It occurs outside the egg-producing structure. b. It requires water. c. The fertilization product is haploid. d. A spore is the product of fertilization. e. None of these are true.

Q: In horsetails, lycophytes, and whisk ferns, a. spores give rise to gametophytes. b. the main plant body is a gametophyte. c. the sporophyte bears sperm- and egg-producing organs. d. the gametophyte is the dominant stage in the life cycle. e. all of these are true.

Q: Which of the following statements concerning production of bryophyte reproductive cells is true? a. Spores and gametes are produced by meiosis. b. Spores and gametes are produced by mitosis. c. Spores are produced by meiosis, whereas gametes are produced by mitosis. d. Spores are produced by mitosis, whereas gametes are produced by meiosis. e. Spores and gametes are both used for sexual reproduction.

Q: Which of the following statements is true? a. Mosses have xylem b. Mosses have lignin. c. Mosses have true stems. d. Mosses have rhizoids. e. Mosses have independent sporophytes.

Q: The above figure represents a plant structural feature with which of the following functions? a. reproduction b. gas exchange c. water conservation d. water transport e. both gas exchange and water conservation

Q: The key innovation that helped sporophyte dominant plants survive in dry environments is a. spores. b. the cuticle. c. xylem. d. phloem. e. lignin.

Q: In the above figure, which of the following would have a haploid number of chromosomes? a. A b. B c. C d. D e. C and D

Q: In the above figure, which of the following would have a diploid number of chromosomes? a. A b. B c. C d. D e. A and B

Q: Which of the following is(are) specialization(s) that evolved in land plants that was(were) unnecessary in their aquatic ancestors? a. xylem b. phloem c. stomata d. roots e. all of these

Q: The cuticle of a plant is primarily for a. retention of water. b. conduction of water. c. absorption of carbon dioxide. d. protection from strong sunlight. e. mechanical support.

Q: Which of the following is NOT true of xylem? a. conducts water up the plant b. conducts mineral ions up the plant c. connects with roots d. connects with leaves e. transports sugars

Q: A significant event influencing the rapid evolution of plants on land after their initial appearance was the a. increase of atmospheric oxygen. b. reduction of ultraviolet radiation penetration through the atmosphere. c. stabilization of global climates. d. increase in soil nutrients. e. merging of land masses.

Q: The following questions refer to the figure above. Which of the photographs in the above figure represents the bryophyte? a. moss b. fern c. conifer d. monocot e. all of these

Q: The following questions refer to the figure above. Which of the photographs in the above figure represents the angiosperms? a. moss b. fern c. conifer d. monocot e. all of these

Q: Which of the following is considered to be most closely related to land plants? a. red algae b. chlorophytes c. charophytes d. trypanosomes e. all of these

Q: How many trees have been planted in Africa by Wangari Maathai's organization over the first 30 years? a. 1 000 000 b. 4 000 000 c. 10 000 000 d. 20 000 000 e. 40 000 000

Q: The world's forests are rapidly being lost to a. fires. b. fungal diseases. c. logging. d. hurricanes. e. decrease in soil fertility.

Q: Which of the following is not a benefit of trees? a. they produce oxygen. b. they absorb carbon dioxide. c. they prevent erosion. d. they prevent flooding. e. all of these are a benefit of trees.

Q: Why can red algae grow at deeper depths of water than green algae?

Q: Are humans responsible for neurotoxic shellfish poisoning?

Q: Which major group of eukaryotes are protists not closely related to?

Q: Why is malaria such an effective disease?

Q: __________ are heterotrophs that grow as a mesh of absorptive filaments. Some are plant pathogens.

Q: In nutrient-rich water, photosynthetic protists may undergo population explosions known as __________.

Q: __________ are aquatic heterotrophs and autotrophs with a cellulose covering.

Q: __________ and __________ are single-celled heterotrophs with a secreted shell.

Q: Euglenoids live in freshwater; a __________ rids them of excess water.

Q: __________ are single-celled and mostly or entirely heterotrophic.

Q: Some protists have complex life cycles and change between the haploid and diploid state. This process is called __________.

Q: Select the best choice for the following statements in reference to the four groups of protists listed below. a. stramenopiles b. amoebozoans c. alveolates d. parabasalids and diplomonads Paramecium belongs to this group.

Q: Select the best choice for the following statements in reference to the four groups of protists listed below. a. stramenopiles b. amoebozoans c. alveolates d. parabasalids and diplomonads This group includes the diatoms.

Q: Select the best choice for the following statements in reference to the four groups of protists listed below. a. stramenopiles b. amoebozoans c. alveolates d. parabasalids and diplomonads The malarial parasite Plasmodium is a member of this group.

Q: Select the best choice for the following statements in reference to the four groups of protists listed below. a. stramenopiles b. amoebozoans c. alveolates d. parabasalids and diplomonads The slime molds are members of this group.

Q: Select the best choice for the following statements in reference to the four groups of protists listed below. a. stramenopiles b. amoebozoans c. alveolates d. parabasalids and diplomonads The common amoeba, Amoeba proteus, is a member of this group.

Q: Select the best choice for the following statements using the five groups listed below. a. apicomplexans b. amoebozoans c. euglenoids d. dinoflagellates e. trypanosomes Chagas disease and African sleeping sickness are caused by members of this group.

Q: Select the best choice for the following statements using the five groups listed below. a. apicomplexans b. amoebozoans c. euglenoids d. dinoflagellates e. trypanosomes Neurotoxin from some members of this group can kill humans.

Q: Select the best choice for the following statements using the five groups listed below. a. apicomplexans b. amoebozoans c. euglenoids d. dinoflagellates e. trypanosomes These move by means of pseudopods.

Q: Select the best choice for the following statements using the five groups listed below. a. apicomplexans b. amoebozoans c. euglenoids d. dinoflagellates e. trypanosomes These possess an eyespot for detecting light needed for photosynthesis.

Q: Select the best choice for the following statements using the five groups listed below. a. apicomplexans b. amoebozoans c. euglenoids d. dinoflagellates e. trypanosomes All members of this group are parasitic alveolates.

Q: Cells very similar to choanoflagellates are found in: a. Land plants b. Sponges c. Mold d. Bacteria e. None of these

Q: The closest relatives of fungi and animals are a. amoebozoans. b. chlorophytes. c. alveolates. d. stramenopiles. e. none of these.

Q: Cellular slime molds can be distinguished from plasmodial slime molds on the basis of a. reproductive structures. b. spore formation. c. number of nuclei per cell. d. slime trails. e. food requirements.

Q: The group Amoebozoa a. are shape shifters. b. includes the amoebas. c. includes the slime molds. d. includes species most of which are able to form pseudopods. e. includes all of these.

Q: Use the figure above to answer the following questions. It shows the life cycle of Chlamydomonas, a green alga. Meiosis and germination of spores is indicated by letter a. A. b. B. c. C. d. D. e. E.

Q: Use the figure above to answer the following questions. It shows the life cycle of Chlamydomonas, a green alga. Asexual reproduction is indicated by letter a. A. b. B. c. C. d. D. e. E.

Q: Use the figure above to answer the following questions. It shows the life cycle of Chlamydomonas, a green alga. Which stage(s) show(s) the diploid portion of the life cycle? a. A b. B c. C d. D e. D and E

Q: Which pigment(s) is(are) characteristic of chlorophytes? a. chlorophyll a b. phycobilins c. chlorophyll b d. phycoerythrins e. chlorophylls a and b

Q: Most freshwater algae belong to which group? a. red algae b. green algae c. brown algae d. golden algae e. blue-green algae

Q: Chloroplasts of red algae may have evolved from ancient endosymbiotic a. cyanobacteria. b. dinoflagellates. c. apicomplexans. d. archaeans. e. nitrifying bacteria.

Q: Red algae a. are primarily marine organisms. b. are thought to have developed from green algae. c. contain xanthophylls as their main accessory pigments. d. are mostly unicellular. e. are all of these.

Q: The red algae are classified as a. rhodophytes. b. chlorophytes. c. phaeophytes. d. bryophytes. e. pterophytes.

Q: The organism shown here represents the ____ stage in the life cycle. a. sporophyte b. gametophyte c. haploid d. motile e. feeding

Q: Use the figure above to answer the following questions. Which letter points to the counterpart of a stem in a flowering plant? a. A b. B c. C d. D e. none of these

Q: Use the figure above to answer the following questions. The large organism shown here belongs to the ____ group? a. kinetoplastids b. diplomonads c. green algae d. red algae e. brown algae

Q: The gritty substance you may feel on your teeth after using toothpaste is actually a. small deposits of sand. b. diatomaceous earth. c. cellulose from dinoflagellates. d. a synthetic abrasive. e. derived from foraminiferans.

Q: Which of these statements is false regarding stramenopiles? a. They have unique flagella with tinsel-like filaments. b. Some species are unicellular. c. They include diatoms and red algae. d. Most are photosynthetic. e. Their chloroplast structure hints at endosymbiotic origins.

Q: Use the figure above to answer the following questions. Which stage(s) produce(s) the characteristic chills and fever of the disease? a. A b. B c. C d. A and B e. B and C

Q: Use the figure above to answer the following questions. Which stage(s) is(are) the diploid sporozoite stage(s) of the Plasmodium (malaria) parasite? a. A b. B c. C d. A and B e. none of these

Q: The above organism is responsible for fish kills and belongs to which of the following groups? a. chrysophytes b. dinoflagellates c. flagellated protozoans d. ciliates e. oomycotes

Q: Red tides and extensive fish kills are caused by population blooms of a. Euglena. b. specific dinoflagellates. c. diatoms. d. Plasmodium. e. fish.

Q: Which of the following specialized structures is NOT correctly paired with a function? a. gullet; ingestion b. cilia; food gathering c. pellicle; digestion d. contractile vacuole; water balance e. pellicle; flexible support

Q: What feature is common to all the alveolates? a. heterotrophy b. lung-like sacs used for respiration c. bioluminescence d. complex life cycle with two hosts e. membrane-bound sacs beneath the plasma membrane

Q: To which of the following groups does the organism in the above figure belong? a. diplomonads, parabasalids, trypanosomes, and euglenoids b. ciliates, dinoflagellates, and apicomplexans c. water molds, diatoms, and brown algae d. chlorophyte and charophyte algae e. amoebas and slime molds

Q: Which of the following is incorrect concerning Radiolarians? a. They have perforated shells of calcium carbonate. b. They form part of the plankton. c. They use pseudopods for feeding. d. They have vacuoles that impart buoyancy. e. They are heterotrophic protists.

Q: To which of the following groups does the organism in the above figure belong? a. diplomonads, parabasalids, trypanosomes, and euglenoids b. ciliates, dinoflagellates, and apicomplexans c. water molds, diatoms, and brown algae d. chlorophyte and charophyte algae e. none of the above

Q: The term "plankton" a. refers to a taxonomic division of algae. b. is a common term for microscopic organisms that drift or swim weakly in water. c. includes only multicellular forms. d. refers to small aquatic plants. e. would apply to large brown algae.

Q: Protists cause all EXCEPT which of the following diseases? a. dysentery b. neurotoxic shellfish poisoning c. malaria d. AIDS e. trichomonal infections of the reproductive tract

Q: Which of the following is NOT a feature of trypanosomes? a. anaerobic respiration b. single, large mitochondrion c. cause widespread and serious infections of humans and cattle in the tropics d. life cycle involves an intermediate, blood-sucking insect host e. causative agents of Chagas disease and African sleeping sickness

Q: Which feature is shared by euglenoids and kinetoplastids? a. an eyespot b. a single flagellum c. photoautotrophy d. parasitic existence e. live in marine and freshwater habitats