Test your basic knowledge |

PCAT Biology Ecology

Subjects : pcat, biology
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. One or both organisms can't survive without the other






2. Regiong beneatht he photic zone that receives no light






3. Gaseous CO2 enters the living world when plants use it to produce glucose via photosynthesis. The carbon atoms in CO2 are bonded to hydrogen and other carbon atoms. the plant uses the glucose to make starch - proteins - and fat






4. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes






5. The vegetation that becomes dominant and stable after years of evolutiionary development






6. Animals that consume green plants (herbivores)






7. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles






8. Organisms that manufacture their own food






9. Lichens and moss






10. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival






11. Needs constant energy source and cycling of materials between the living system






12. Community in an ecological succession is identified by a dominant species






13. Animals eat plants and use the digested nutrients to form carbohydrates - fats - and proteins characteristic of the species. a part of these organic compounds is used as fuel in respiration in plants and animals






14. Sunlit layer of the open sea extending to a depth of 250-600ft






15. Two fates await the ammonia (NH3). some are nitrified or dentrified






16. The orderly process by which one biotic community replaces or succeeds another until a climax community is established






17. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place






18. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures






19. Only animal life and other heterotrophic life exists






20. Rivers - lakes - ponds - and marshes






21. The ultimate source of energy for all organisms






22. The study of interactions between organisms and their environment






23. Freshwater Biomes vs. Saltwater 2: In rivers and streams - strong swift currents exist - and thus fish that have developed strong muscles and plants with _____________ have survived






24. One that exerts control over the other species that are present






25. Receive less rainfall than the temperate forests - have long - cold winters - and are inhabited by single coniferous tree-the spruce -extreme northern parts of Canada and Russia






26. First to resettle a virgin area






27. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes






28. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor






29. More than 70% of earth -plants have little controlling influence in communities -most stable ecosystems; the conditions affecting temperature - amount of available oxygen and cabon dioxide - and amount of suspended or dissolve materials are very stab






30. Links between oceans and land






31. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die






32. Animals that eat both plants and animals






33. Receive less than ten inches of rain each year; the rain is concentrated within a few heavy cloudbursts -ex: Sahara in Africa and Gobi in Asia






34. Rhododendrons and pines are more suited for growth in acid oil






35. Defines the functional role of an organism in its ecosystem -described what the organism eats - where and how it obtains its food - what climatic factors it can tolerate and which are optimal - the nature of its parasites and predators - where and ho






36. Determines water holding capacity






37. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness






38. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids






39. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans






40. Because organisms at the upper levels of the food chain derive their food energy from organisms at lower levels - and because energy is lost from one level to the next - each level can support a successively smaller biomass






41. Distinct community in a geographic region






42. An essential component of amino acids and nucleic acids - which are the building blocks of all living things






43. Nekton and benthos - scavengers - and predators (fiercely competitive)






44. Any group of similar organisms that are capable of reproducing






45. Determines the nature of plant and animal life in the soil






46. Animals that consume primary consumers (carnivores)






47. Adaptations for maintaining their internal osmolarity and conserving water






48. One species may be competitively superior to the other and drive the second to extinction






49. Algae - crabs - crustacea - and many different species of fish






50. Include reproduction and protection from predators and destructive weather