Which of these is MOST LIKELY to be studied in ecology?

• The method of water transport in a tree.

• A comparison of muscle cells among birds and reptiles.

• The circulatory system of earthworms.

• The interaction between populations of wolves and deer.

A heron is affected by many factors in its environment. What distinguishes the biotic factors from the abiotic factors?

• location in the water or out of the water

• plant or animal

• living or nonliving

• food or not food

Which data are MOST useful for analyzing the climate of the region?

• average time of sunrise and sunset in July

• the highest and the lowest daily rainfall in July of this year

• the daily high temperature for every day in July of this year

• average temperatures for July, measured over 30 years

Greenhouse gases include carbon dioxide and methane. How do greenhouse gases act to increase air temperatures near Earth's surface?

• They trap heat that is radiated from the surface.

• They reflect heat that enters the atmosphere.

• They emit heat when they undergo chemical reactions.

• They transmit visible light that enters the atmosphere.

What is the relationship between global winds and global ocean currents?

• The pattern of global winds is one of the factors that drives global ocean currents.

• The pattern of global ocean currents is one of the factors that drives global winds.

• Both are caused by heat from the sun, and they do not affect each other.

• Both are caused by Earth's rotation, and they do not affect each other.

The temperate grasslands biome includes regions of several continents. What do all the regions have in common?

• The same species of grazing animals.

• The same species of grasses.

• The same seasonal patterns of temperature and precipitation.

• The same amount of land that is covered in grasses.

Which climate graph is for a wet and hot rainforest?

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In which biome does an organism have to be able to conserve water to survive?

• Rainforest
• Taiga
• Desert
• Temperate Forest

As a team of explorers travels southward from the North Pole into Canada, they encounter a dense forest of pines and other coniferous evergreens. They leave the forest before the winter, which is long and cold. Which of these biomes has the team visited?

• temperate grasslands

• Northwest coniferous forest

• tropical dry forest

• boreal forest (taiga)

Jorge is exploring the ocean. On which of these journeys is he MOST LIKELY to pass from the photic zone into the aphotic zone?

• A boat trip from the shore to the middle of the ocean.

• A boat trip from the middle of the ocean to the shore.

• A submarine dive from the surface into deep ocean water.

• A walk from the intertidal zone into shallow ocean water.