Ecosystems Post-Test RETAKE

Read each scenario carefully. Decide if the population will increase or decrease (1 point). Explain why (1 point). The berries and seeds from a small habitat are a food source for local squirrels and blue birds. If the squirrels are better competitors, what will happen to the blue bird population Under which of the following situations will a population increase? Emigration Births Deaths An decrease in resources Which of the following is a biotic factor in a forest ecosystem? Temperature Precipitation Rose Soil Which of the following is an abiotic factor in a forest ecosystem? Deer Water Bird Tree Platypuses live in eastern Australia, inhabiting freshwater systems like rivers, streams, and lakes, Niche Species Habitat Population True False When two male lions fight over a dead zebra, it is called interspecific competition Wolves are known to eat meat. They are omnivores. Label the diagram species population community ecosystem biome biosphere Which statement describes the flow of matter and energy in decomposers? A decomposer digests living organisms to produce energy, water, and carbon dioxide. A decomposer uses carbon dioxide, water, and energy from the sun to produce oxygen and sugars. A decomposer consumes dead or dying organisms to produce oxygen and sugars. A decomposer breaks down decaying matter to produce energy and release nutrients back into the environment. The diagram shows how energy can move through an ecosystem.Which organism would complete the diagram? Tree Worm Eagle Mushroom This image shows two organisms in their environment. Drag each statement in the correct box for the organism it describes. Grass Producer gets energy and matter from the nonliving environment Rabbit Consumer Gets energy and matter from other living organisms Both Needs energy to live Two separate food webs are pictured here.According to the food webs, which two organisms do not exhibit a competitive relationship over resources? bison and elk eagle and black bear elk and beaver beaver and bison Swollen thorn acacia plants and acacia ants have a unique relationship. The plant creates edible nectar and provides shelter for the ant colonies, while the ants provide protection from competing plants and organisms trying to eat the acacia plant. This relationship has become so interdependent that the ants cannot digest sugars from plants other than acacias. Write one word in each blank to correctly complete the sentences. If a drought caused an acacia plant to secrete less nectar, the ant population would likely decrease.If the ants were able to digest sugars from other plants, they might find other shelter, causing the acacia plant population to decrease. This relationship is an example of mutually beneficial. Look at the diagram of the ocean ecosystem. A commercial fishing boat is overfishing in the area. The population of fish decreases. How will the other populations be affected by the change in the food web? Write the letters of each answer choice in the correct column. Increase zooplankton phytoplankton Decrease Seagulls Sharks