Chapter 5; Interactions in Ecosystems

In an ecosystem, birds depend on insects to survive. If someone uses pesticides to control or kill the insect population, the bird population will most likely...

• increase

• decrease

• decrease, then increase

• increase, then decrease

Why do trees like maple and spruce grow in a temperate rainforest community?

• dry and hot climate

• wet and hot climate

• dry and cool climate

• wet and cool climate

Which biome is home to more species than any other biome?

• taiga

• grassland

• deciduous forest

• tropical rainforest

Which adaptation best helps elk survive in the taiga biome?

• thick fur

• large antlers

• change of color

• winter hibernation

Which of the following is the source of much of the oxygen in the atmosphere?

• plants

• volcanes

• trucks and cars

• plankton in the ocean

Corals have a symbiotic relationship with plant-like algae that grow inside them. How do the algae benefit the corals?

• The algae provide the corals with various nutrients.

• The algae help the corals make a hard outside coating.

• The algae allow the corals to live in deep ocean environments.

• The algae release a toxin that keeps predators away from the

  corals.

A plant in the desert would most likely have which root system?

• a small taproot with long root hairs

• a small taproot with short root hairs

• a large root system, close to the surface

• a large root system, deep beneath the surface

Creatures that live in the deep ocean need to adapt to which environmental factor?

• lack of food

• high pressure

• low levels of salt

• high temperatures

Both organisms need each other to survive in which of the

following examples?

• a squirrel scaring insects off a tree into the path of birds

• a microorganism living in the stomach of a wolf

• a parasitic worm living in a fox’s bloodstream

• a fungus and bacteria forming a lichen

Different kinds of plants living in the same area must compete for water. Which kind of plant has the greatest chance of survival?

• a plant with a compact root system

• the plant with the largest leaves

• a plant with needles instead of leaves

• the plant with the largest root system