Life Science Unit I Test Review

1. Life Science Unit I Test Review

2. For this unit, you should be able to: • Describe how living things interact on several levels of organization: organism, population, community, ecosystem, and biosphere. • Describe the role of organisms as producers, consumers, herbivores, carnivores, or decomposers in an ecosystem. Give examples of each. • Describe how predators and prey control each other’s population. • Define symbiosis and describe three types of symbiotic relationships: mutualism, commensalism, and parasitism. Give examples. • Describe how biotic and abiotic factors can influence an ecosystem. • Describe a simple food chain or food web using the words producer, consumer (primary, secondary and tertiary) and trophic level.

3. For this unit, you should be able to: • Describe how energy flows through ecosystems with reference to the pyramid of energy, pyramid of numbers and pyramid of biomass. • Describe several abiotic factors that influence the distribution of living things. • List and describe characteristics of each of the eight different biomes you studied. Provide characteristic plants and animals. • Describe how organisms become adapted to the environment using vocabulary such as mutation, adaptation and natural selection. • Provide examples of different adaptations that predator and prey species may have to help them survive.

4. For this unit, you should be able to: • Describe the role of biodiversity in stabilizing an ecosystem. • Define keystone species and give an example. • Define how competition can occur between species and within species in a community and what may result. • Describe how resource partitioning can lead to adaptive radiation. • Provide examples of foreign species and possible impacts of their introduction into an ecosystem. • Distinguish between primary and secondary succession , and describe the role of pioneer species in succession

5. Practice Questions

6. In a food web, how much energy is transferred to the next trophic level? 10% Energy is lost to life processes such as reproduction, as well as heat

7. Which of the following organisms is a decomposer? None of the Above Lichen Dung Beetle Vulture Fungus

8. An ecologist wants to gather information about a stream along a mountainside. Which of the following is a biotic factor? None of the above water flow rate mineral deposits water temperature variety of life forms

9. What relationship exists between the bee and the flower? predation consumerism parasitism commensalism mutualism

10. Which of the five biomes would have the greatest rate of photosynthesis? Polar Ice Desert Temperate Rainforest Boreal Forest Tropical Rainforest

11. Which of the following characteristics would describe the biome shown in the picture below? permafrost a lot of precipitation long, hot winters many deciduous trees small amounts of rainfall

12. Consider the following climatograph which shows monthly precipitation and temperatures for the town of Tofino. What is the average temperature of Tofino during the month of May? None of the above 25°C 15°C −18°C 10°C

13. Which of the following type of relationships does the organism pictured below participate in? None of the above Predation Mutualism Commensalism Parasitism

14. The picture below illustrates what type of relationship? None of the above Mutualism Predation Parasitism Commensalism

15. Organisms that feed on fecal matter and other organic waste would best be described as decomposers producers herbivores carnivores detrivores

16. Which of the following species is most likely to occupy the second trophic level in an ecosystem? None of above insect-eating bird bird-eating cat apple apple-eating insect

17. Which of the following characteristics distinguishes decomposers from other consumers? None of the above The tendency to gain nutrition from dead organisms The ability to produce food Their position within a grazing food chain The ability to chemically break down organic compounds

18. Which of the following describes detrivores? None of the above organisms that photosynthesize organisms that feed on producers organisms that are parasites organisms that feed on plant and animal remains

19. In which of the following biomes would the removal of a species have the greatest impact? temperate rainforest grassland tropical rainforest boreal forest tundra

20. In which of the following situations would primary succession occur? None of the above after a flood after the logging of a climax forest after a forest fire on bare rock

21. Which of the following is most likely to lead to a decrease in species diversity? None of the above species proliferation adaptive radiation biodegradation extinction

22. Which of the following would not be considered a primary consumer? dikdik cow deer rabbit orca

23. What level of organization would a flock of geese be classified as? biosphere ecosystem organism community population

24. A symbiotic relationship in which both partners benefit is called None of the above consumerism commensalism parasitism mutualism

25. Which of the following is considered a biotic factor? temperature wind sunlight water parasites

26. In the food web below, which of the following organisms is an omnivore? deer marmot red-tailed hawk chipmunk grizzly bear

27. Which of the following is more likely to be a predator adaptation? None of the above being poisonous mimicry displaying warning colouration being able to travel at high speed

28. In the picture below, one of the frog species is harmless, while the other two are highly toxic. What is this an example of? Mimicry

29. This picture illustrates what process? None of the above Extinction Extirpation Proliferation Adaptive radiation

30. The process that favours the survival of organisms with traits that make better adapted to the environment is known as ___________________. Natural Selection

31. What advantage do food webs have over food chains? Food webs show many feeding relationships.

32. Which of the following is a characteristic of the tundra biome? None of the above annual rainfall in excess of 120 cm per year high plant growth deciduous forests permafrost layer

33. What biome does not support herbivores? None of the above Tropical rainforest Tundra Desert Polar ice