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Exam 2 Quizzes

BIOL-1409 with Professor Cash, Fall 2022

QuestionAnswer
How do protists compare to / contrast with bacteria & archaea? Both protists and bacteria & archaea are microscopic.
Biologists hypothesize that the process by which eukaryotic cells (including protists) arose is Endosymbiosis.
Algae are the plant-like protists. How do algae differ from plants? Algae can be characterized by their pigments
Slime molds & water molds are protists and not fungi because slime molds & water molds have / are in the wrong Body (unicellular, not multicellular like fungi).
Which is an accurate description of protozoa? Heterotrophic like animals, but unicellular
Which is NOT a unique evolutionary development (found in ALL plants and ONLY in plants) that allowed plants to live on dry land? Photosynthesis
Which is the correct definition of sporophyte as a feature of alternation of generations? Multicellular diploid generation; undergoes meiosis to yield haploid spores
What evolutionary advantage/s do ferns & their allies/close relatives have that mosses/bryophytes lack? A dominant diploid generation & vascular tissue
Through evolution, gymnosperms have escaped the need for Water for reproduction (have windblown pollen).
Which best describes why angiosperms are now the dominant plants? Their flowers attract animals, and animals disperse their seeds.
Plants are multicellular terrestrial photoautotrophs. As multicellular organisms, plants have tissues. Which is the BEST describes the structure & function of dermal tissue? Single layer of flat cells covered with waterproof waxy cuticle; protection
Plant leaves have pores called stomata to allow for gas exchange. How do stomata open & close? When water is plentiful, turgid guard cells swell & open the stomata.
Plants are multicellular organisms with tissues organized into organs. Which is the best description of the stem as a plant organ? Support & transport; vascular tissue in bundles (monocots) or rings (eudicots)
Plants are multicellular organisms with tissues organized into organs & organs working together as organ systems. Which best describes the function of the shoot system of a plant? Reproduction & photosynthesis
Certain plant organs have specialized functions. Which best describes the function of a "knee"? Root that extends out of water-logged soil for gas exchange (cypress at Water Gardens)
What kind of nutrients do plants need? Only inorganic
What is the significance of mycorrhizae? Fungi living on plant roots convert organic matter into INorganic nutrients (especially phosphorus) needed by the plants.
What is the significance of root nodules? It is a symbiotic relationship between nitrogen-fixing bacteria & plants (especially legumes--peas & beans).
Cohesion & adhesion (special properties of water) govern how Water moves in xylem.
In the pressure-flow model of material transport, what generates the pressure? Osmosis, as water diffuses into the phloem after sucrose is actively pumped in
Vegetative propagation (or tissue culture) of plants is of evolutionary advantage When environmental conditions are stable & plants are well-adapted to their surroundings.
The life cycle of plants is called alternation of generations. Which best describes sporophyte as a component of this life cycle? Multicellular diploid generation; undergoes meiosis to yield haploid spores
In angiosperms, flowers are modified stems with 4 whorls of modified leaves: calyx, corolla, stamen, & carpel. Which is NOT a function of flowers? Carry out photosynthesis
Double fertilization, like flowers, is unique to the angiosperms. Double fertilization results in Diploid zygote (develops into embryonic sporophyte) & triploid endosperm (stores food for embryo).
Dormancy in seeds occurs as metabolism slows & moisture is lost. What is the evolutionary advantage of dormancy? BOTH dispersal from a parent's shade AND germination only in favorable conditions
Created by: knrandles
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