Biology 2
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110 questions
| 🇬🇧 | 🇬🇧 |
| Alternation of generations means that plants produce: | Both haploid and diploid multi-cellular organisms |
| How does a haplonic plant population maintain genetic diversity? | Zygotes are produced by random fusion |
| What characteristic is present in land plants but not Charales? | Alternation of generations |
| What result would support the conclusion that charophytes should be included in the plant kingdom? | The Chara genome is more similar to the tomato plant genome than the red algae genome. |
| Which feature does not support the inclusion of charophytes in the plantae kingdom? | Charophytes are multi-cellular organisms that lack vascular tissue. |
| Why do mosses grow well in the Arctic Tundra? | They do not have true roots and can grow on hard surfaces. |
| The dominant organism in fern is the ___ | Sporophyte |
| What seedless plant is a renewable source of energy? | Sphagnum moss |
| How do mosses contribute to returning nitrogen to the soil? | Mosses decompose rocks and release nitrogen. |
| The production of megaphylls by many different species of plants is an example of ___. | Parallel evolution |
| Seed plants are? | All heterosporous |
| What trait characterizes gymnosperms? | The plants carry exposed seeds on modified leaves. |
| Magasporocytes will eventually produce what? | Female gametophytes |
| What is the ploidy of the following structures: gametophyte, seed embryo, spore, sporophyte? | 1n, 2n, 1n, 2n |
| In the course of double fertilization, one sperm egg fuses with the egg and the second one fuses with ____. | The polar nuclei of the center cell. |
| Plants are a source of: | Food, fuel, and medicine. |
| In a plant's male reproductive organs, development of pollen takes place in a structure known as the ___. | Microsporangium |
| What is an advantage of asexual reproduction? | When cuttings or buds are taken from an adult plant or plant parts, the resulting plant will grow into an adult faster than a seedling. |
| Which parasitic protist evades the host immune system by altering its surface proteins with each generation? | Trypansoma brucei |
| An example of carbon fixation is __. | Photosynthesis |
| What genus of protists appears to contradict the statement that unicellularity restricts cell size? | Caulerpa |
| The amoeba E. histolytica is a pathogen that forms liver abscesses in infected individuals. Its metabolic classification is most likely _____ | Anaerobic heterotroph |
| Alternation of generations describes what? | Both the haploid and diploid forms can be multicellular. |
| Which of the following observations about a bacterium would distinguish it from the last eukaryotic common ancestor? | Lack of a membrane-bound structure surrounding the genome |
| Mitochondria most likely evolved by _____________. | Endosymbiosis |
| Which characteristic is shared by prokaryotes and eukaryotes? | DNA-based genome |
| DNA-based genome | Oxygenation of the atmosphere |
| In addition to providing yogurt with its unique flavor and texture, lactic acid-producing bacteria also provide which additional benefit during food production? | Lowering the pH to kill pathogenic bacteria |
| Bioremediation includes _____. | The use of prokaryotes to clean up pollutants |
| Ammonification is the process by which _____. | Ammonia is released during the decomposition of nitrogen-containing organic compounds |
| Which of the following elements is not a micronutrient? a. calcium b. boron c.chromium d. manganese | Calcium |
| The lipopolysaccharide layer (LPS) is a characteristic of the wall of ________. | Gram-negative bacteria |
| Pseudopeptidoglycan is a characteristic of the walls of ________. | Archaean prokaryotic cells |
| The cell wall is ________. | Exterior to the cell membrane |
| What consists of prokaryotic cells? | Bacteria and archaea |
| Halophiles are organisms that require________. | A salt concentration of at least 0.2 M |
| Microbial mats __________. | Are the earliest forms of life on Earth, obtained their energy and food from hydrothermal vents, and are multi-layered sheets of prokaryotes including mostly bacteria but also archaea |
| Vaccines _______. | Stimulate an immune response |
| DNA viruses _______? | Use host cell's machinery to produce new copies of their genome. |
| Oncogenic virus cores can be_______. | Either RNA or DNA |
| Reverse transcriptase______ | Transcribes RNA to make DNA |