IB Biology Ecology

After a forest fire, an ecosystem would start regrowth through -

• primary succession

• secondary succession

• climax community

• limiting factors

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Why do grasses appear before shrubs in ecological succession?

• loosen the dirt for new trees to take roots?

• provide food for animals returning to the area

• require plenty of sunlight to make their own food

• can grow even in areas with shallow soil

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NGSS.MS-LS2-1

The living factors of an ecosystem, such as plants, animals, & fungi are called

• biotic factors

• abiotic factors

• ecosystem

• population

Which organism do the owl and the weasel compete for in the food web?

• Hawk

• Spider

• Grasshopper

• Shrew

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Which of the following processes removes carbon from the atmosphere?

• Plant Respiration

• Auto and factory emissions

• Photosynthesis

• Animal Respiration

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If the amount of dissolved oxygen in the light bottle used for the investigation in the lesson does not change, an explanation for this is

• The rates of photosynthesis and respiration are equal

• Respiration is not occurring

• photosynthesis is not occurring

• no photosynthesis occurred

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One characteristic feature of the tundra is that only the surface thaws in the summer and refreezes in the winter, leaving a permanently frozen subsoil. This characteristic is known as

• Hoarfrost

• Glaciation

• Permafrost

• Crystallization

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Which biome covers most of the land mass near Earth's equator?

• Desert

• Grassland

• Tropical rainforest

• Temperate forest

The biomass available for consumption by the herbivores and the decomposers is called

• Net primary productivity

• Secondary productivity

• Standing crop

• Gross primary productivity

During the process of ecological succession the changes that take place in communities are

• Orderly and sequential

• Random

• Very quick

• Not influenced by the physical environment

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