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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. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds






2. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere






3. Forest floors contain moss and lichens






4. Integrated system of species that are dependent upon one another for survival






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






6. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores






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






8. The study of interactions between organisms and their environment






9. Include those protists and fungi that decompose dead organic matter externally and absorb the nutrients - they consistitute a vital link in the cycling of material within the ecosystem






10. 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






11. 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






12. Cold - dry - and inhabited by fir - pine - and spruce trees -much vegetation has evolved adaptations for water conservation such as needle-shaped leaves -Extreme Northern Part of the US and in Southern Canada






13. Characterized by low rainfall - although considerably more than the desert biomes receive -provide no shelter for herbivorous mammals from carnivorous predators -ex: East of the Rockies - steppes of the Ukraine - and the pampas of Argentina






14. Region typical of the open seas and can be divided into photic and aphotic zones






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






16. Regiong beneatht he photic zone that receives no light






17. Freshwater Biomes vs. Saltwater 1: Freshwater is _______________ which results in the passage of water into the cell. Freshwater organisms have homeostatic mechanisms to maintain water balance by the regular removal of the excess water. these include






18. Links between oceans and land






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






20. Animals that consume green plants (herbivores)






21. Without a constant input of energy from the sun - an ecosystem would soon run down - as food is transferred from one level of the food chain to the next - a transfer of energy occurs






22. 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






23. Developed long legs and many are hoofed






24. Crawling and sessile organsms






25. The nitrogen locked up in the wastes and dead tissues is released by the action of the bacteria of decay - which convert the proteins into ammonia






26. 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






27. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment






28. 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






29. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins






30. Includes the community and the environment and usually all five kingdoms






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






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






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






34. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms






35. The ultimate source of energy for all organisms






36. Consists of populations of different plants and animal species interacting with each other in a given environment






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






38. Free-living organisms that feed on other living organisms






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






40. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat






41. 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






42. Animals that only eat other animals -possess pointed teeth and fang-like canine teeth for tearing flesh -have shorter digestive tracts because the easier digestibility of animal food






43. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants






44. Animals that feed on secondary consumer






45. When a parasite benefits at the expense of the host






46. Determines water holding capacity






47. Composed of populations that are able to exist under the new conditions






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






49. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down






50. Rock and soil surface