Test your basic knowledge |

Subject : science
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Position reactants so they dont require as much activation energy






2. Brings leaf water and nutrients - exports sugars






3. Alternate between sporophyte and gametophyte in the plant life cycle






4. Mycorrhizas and the bubble shaped guys






5. Gather and convert light energy - control CO2 and water loss






6. A simple compound whose molecules can join together to form polymers






7. Flower to play the role of the gametophyte - producing two different spore types






8. Command center






9. Ability crucial to plant structure and processing of energy - allows change to be made to help survival






10. Sorting and shipping of molecules






11. The OEC splits water and transfers the electrons to the P680 or cholorphyll reaction center. In the meantime - the photosystem is absorbing light energy and funnels the energy into the p680 - from which - through a series of redox reactions - the kin






12. Mosses have no vascular tissue. Ferns reproduce with spores. Conifers reproduce with seeds. Flowering plants have flowers.






13. Consists of dead hollowed out cells - come in tracheids (long) or vessels (short) - move water in plant






14. Develop bordered pits to prevent spreading of bubbles - tracheids let water move laterally - refill at night - produce new xylem every spring






15. 1) taking wood from an ecosystem also takes nutrients 2) seedling establishment isn't that easy -- lots of competition and herbivory to overcome in building a new forest






16. Cell walls of cellulose - photosynthesis - indeterminate growth - asexual and sexual reproduction






17. Produces bisexual spores - they become gametophytes w/ egg and sperm (study the picture)






18. Rigid support - mostly found in bark. two types -- fibers and sclereids






19. Haploid - produces gametes through mitosis






20. Penetrate root cortex into vascular tissue - aid in acquiring nitrogen and phosphorous in exchange for sugars






21. Convert light energy to chemical energy






22. Provide oxygen - food - medicine - fuel - shelter - paper products - beauty






23. Web of protein strands throughout the cell that allows organelles and molecules to move via motor proteins






24. A thin membrane around the cytoplasm of a cell - gatekeeper of the cell






25. Have underground stems that store starch (ex. potato)






26. CO2 (exhale) + H20 + ATP (energy) ? CH20 (food) + 02 (air)






27. Comes in twos - sieve tubes (no nucleus) and companion cells (nourish sieve tubes) - transport sugars and nutrients






28. Addition of H2O to break apart polymer






29. 1. Prokaryotes are approximately the same size as their organelle counterparts. 2. Double membrane 3. Chloroplasts and mitochondria have their own unique circular DNA






30. Makes dermal tissue for bark






31. Glycolysis - krebs cycle - electron transport chain






32. Spore that gives rise to independent bisexual gametophyte that produces both egg and sperm (mosses and ferns)






33. Number of ATP molecules from 1 glucose in cellular respiration (total produced -- 38 - total yield -- 36)






34. Practice of employing management strategies to allow healthy return of timber harvest. (ex. leave mature trees - plant seedlings)






35. Made of monosaccharides - building blocks of life - sugars






36. A series of proteins in which the high-energy electrons from the Krebs cycle are used to convert ADP into ATP by redox reactions






37. Second stage of cellular respiration - in which pyruvic acid is broken down into carbon dioxide in a series of energy-extracting reactions






38. Part of calvin cycle where five G3Ps are recycled - processed - and linked to form more materials for carbon fixation






39. Produce vessels year round (ex. northern Arizona aspen)






40. Provides flexible support - like in celery






41. Root hairs capture water and minerals and move them through (symplasticly) or between (apoplasticly) cells until the endodermis filters it into the vascular tissue






42. Made of acetyl groups - structure energy and storage






43. The atmosphere is 21% oxygen - so that inherently means that over time plants have taken in more CO2 than they produce. this must be the case - otherwise we would all be dead.

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44. Free energy in reactants stored in products (carbs)






45. Removal of H2O to link monomer and polymers






46. Produce vessels in spring and tracheids in winter (ex. oak tree)






47. Indeterminate growth - assisted reproduction - protection (chemical deterence - spikes - internal resource transport)






48. Make long thin stems called 'runners' that grow above ground and aid in asexual reproduction






49. First step in releasing the energy of glucose - in which a molecule of glucose is broken into two molecules of pyruvic acid






50. Part of leaf that is loose for easy gas diffusion