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. Include reproduction and protection from predators and destructive weather






2. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion






3. 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






4. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia






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






6. Include saprophytic organisms and organisms of decay






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






8. 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






9. Each member of a food chain uses some of the energy it obtains from its food for its own metabolism and loses some additional energy in the form of heat






10. 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






11. Determine by the amount of decaying plant and animal life in the soil






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






13. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms






14. Regiong beneatht he photic zone that receives no light






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






16. Links between oceans and land






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






18. Includes climate - temperature - availability of light and water - and the local topology






19. 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






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






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






22. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active






23. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish






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






25. Encompasses all that is external to the organism and is necessary for its existence






26. Two species may rapidly evolve in divergent directions under the strong selection pressure resulting from intense competition. thus - the two species would rapidly evolve greater differences in their niches






27. 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






28. Elemental nitrogen is chemically inert and cannot be used by most organisms. Lightning and nitrogen-fixing bacteria in the roots of legumes change the nitrogen into the usable - soluble nitrates






29. The ultimate source of energy for all organisms






30. Deer - fox - woodchuck - and squirrel






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






32. Organisms that manufacture their own food






33. 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






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






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






36. The oceans






37. The major component of the internal environment of all living things






38. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying






39. 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






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






41. Animals that consume green plants (herbivores)






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






43. Only animal life and other heterotrophic life exists






44. Every energy transfer involves a loss of energy and each level of the food chain uses some of the energy it obtains from the food for its own metabolism and loses some additional energy in the form of heat






45. Polar bears - musk oxen - and arctic hens






46. Region exposed to low tides that undergoes variations in temperature and periods of dryness






47. 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






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






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






50. 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






Can you answer 50 questions in 15 minutes?



Let me suggest you:

Browse all subjects

Browse all tests

Most popular tests



Major Subjects

Tests & Exams


AP
CLEP
DSST
GRE
SAT
GMAT

Browse all subjects

Browse all tests

Most popular tests