SDSU BIOL 459 Exam 1 Questions with 100% Verified
Answers Latest Update
Question: Why study plants?
Answer:
To help conserve endangered plants and threatened environments
To learn more about the natural world
To better harness the abilities of plants to provide us with food, medicines, and energy
Question: Why study plant biology?
Answer:
•Show interrelationships between plants and other fields of study
•Gain fundamental knowledge for other upper division plant biology courses
•Share expertise gained with non-botanists
•Prepare for careers in plant biology
Question: Ecological Services Plants Provide
Answer:
•Plants help to control atmospheric temperatures
-convert carbon dioxide and water into carbohydrates and oxygen (photosynthesis)
•Increased CO2, nitrogen oxides, methane, chlorofluorocarbons (CFCs) have intensified
global-warming
-trapping of Earth's radiating surface heat!
Question: Transgenic plants (GMOs)
Answer:
•new properties through genetic engineering
-More nutritious
-Deter pests (e.g., insects)
-Deter pathogens (e.g., fungi, viruses)
•GMOs in the future
-Biodegradable plastics
-Vaccines
-Anti-cancer compounds
Question: Ancestors
Answer:
Plants descended from a eukaryotic ancestor + a cyanobacteria
Question: What is a Land Plant (Kingdom Plantae)?
, Answer:
•An organism that is green & photosynthetic
-Autotroph ("self-feeders")
-Need complex pigment system to capture light energy and store as an organic molecule
•Additional characteristics:
-Cell wall composed of cellulose
-Multicellular body
-Can control water loss
-Have strengthening tissues
-Can reproduce by means of microscopic, drought-resistant spores
Question: Colonization of Land
Answer:
•Evolution of structures to obtain water & minimize water loss (cont.)
-Epidermis: outermost cell layer covered with a protective, waxy cuticle (retards water loss)
-Stomata: maintain a balance between water loss and the plant's oxygen and CO2
requirements
Question: Serious diseases threaten the world's food supply
Answer:
•Phytophthora infestans, cause of potato late blight, has re-emerged as a threat.
•
•
•Puccinia graminis tritici, the wheat stem rust fungus, has developed into a highly
aggressive form.
Question: Primary Metabolites
Answer:
•compounds that are commonly produced by all plants and that are directly used in plant
growth and development
•The main primary metabolites are carbohydrates, proteins, nucleic acids, and lipids
Question: Green Algae and Green Plants
Answer:
Chloroplasts:
-chlorophyll a & b
-storage product starch
-thylakoids in stacks: grana Cell walls with cellulose: (polymer of glucose units:
beta-1,4-glucopyranosides;starch is alpha-1,4-glucopyranosides
Question: Amino acids joined by
Answers Latest Update
Question: Why study plants?
Answer:
To help conserve endangered plants and threatened environments
To learn more about the natural world
To better harness the abilities of plants to provide us with food, medicines, and energy
Question: Why study plant biology?
Answer:
•Show interrelationships between plants and other fields of study
•Gain fundamental knowledge for other upper division plant biology courses
•Share expertise gained with non-botanists
•Prepare for careers in plant biology
Question: Ecological Services Plants Provide
Answer:
•Plants help to control atmospheric temperatures
-convert carbon dioxide and water into carbohydrates and oxygen (photosynthesis)
•Increased CO2, nitrogen oxides, methane, chlorofluorocarbons (CFCs) have intensified
global-warming
-trapping of Earth's radiating surface heat!
Question: Transgenic plants (GMOs)
Answer:
•new properties through genetic engineering
-More nutritious
-Deter pests (e.g., insects)
-Deter pathogens (e.g., fungi, viruses)
•GMOs in the future
-Biodegradable plastics
-Vaccines
-Anti-cancer compounds
Question: Ancestors
Answer:
Plants descended from a eukaryotic ancestor + a cyanobacteria
Question: What is a Land Plant (Kingdom Plantae)?
, Answer:
•An organism that is green & photosynthetic
-Autotroph ("self-feeders")
-Need complex pigment system to capture light energy and store as an organic molecule
•Additional characteristics:
-Cell wall composed of cellulose
-Multicellular body
-Can control water loss
-Have strengthening tissues
-Can reproduce by means of microscopic, drought-resistant spores
Question: Colonization of Land
Answer:
•Evolution of structures to obtain water & minimize water loss (cont.)
-Epidermis: outermost cell layer covered with a protective, waxy cuticle (retards water loss)
-Stomata: maintain a balance between water loss and the plant's oxygen and CO2
requirements
Question: Serious diseases threaten the world's food supply
Answer:
•Phytophthora infestans, cause of potato late blight, has re-emerged as a threat.
•
•
•Puccinia graminis tritici, the wheat stem rust fungus, has developed into a highly
aggressive form.
Question: Primary Metabolites
Answer:
•compounds that are commonly produced by all plants and that are directly used in plant
growth and development
•The main primary metabolites are carbohydrates, proteins, nucleic acids, and lipids
Question: Green Algae and Green Plants
Answer:
Chloroplasts:
-chlorophyll a & b
-storage product starch
-thylakoids in stacks: grana Cell walls with cellulose: (polymer of glucose units:
beta-1,4-glucopyranosides;starch is alpha-1,4-glucopyranosides
Question: Amino acids joined by
