Biology Unit 2 Exam

#1) Which of the following levels of organizations in ecology is arranged in the CORRECT sequence from most specific to most broad?

• species, population, community, ecosystem, biosphere
• biosphere, ecosystem, community, population, species
• population, community, species, biosphere, ecosystem
• species, community, ecosystem, population, biosphere

#2) Which of the following describes a benefit of biodiversity to an ecosystem?

• DECREASES the energy flow through the ecosystem.
• INCREASES the maximum number of trophic levels.
• INCREASES the maximum biomass of the ecosystem.
• Allows the ecosystem the stability to withstand environmental changes.

#3) Which of the following best describes the flow of energy through a food chain?

• Energy flows between the PRIMARY PRODUCERS & CONSUMERS in either direction
• Energy flows from CONSUMERS to PRIMARY PRODUCERS in one direction only
• Energy flows from PRIMARY PRODUCERS to CONSUMERS in one direction only
• Energy flows between PRIMARY PRODUCERS & CONSUMERS in an endless cycle

#4) Juanita is studying the food web of the open ocean. Which step would be the most useful for her to follow to identify the primary producers of the food web?

• Look for fish that live near the surface of the water
• Look for tiny phytoplankton that float near the ocean surface
• Look for small heterotrophic plankton near the ocean surface
• Look for plants or animals that live along the ocean floor

#5) Which data is most useful for analyzing the climate of a region?

• Average time of sunrise & 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 the course of the past 50 years

#6) A heron is a bird whose survivability is affected by many factors in its environment. What distinguishes the biotic from the abiotic factors?

• Location in the water vs out of the water
• Plant vs animal
• Living vs nonliving
• Food vs not food

#7) Which of these subjects is most likely to be studied in ecology?

• The method of water transport in an individual tree
• A comparison of muscle cells among birds vs reptiles
• The circulatory system of earthworms
• The interaction between populations of wolves & deer in an ecosytem

#8) If 1,000 J of energy is captured by primary producers in an ecosystem, how much energy would typically be passed on to the consumer at the next level of the food web for that ecosystem?

• 1,100 J of energy
• 1,000 J of energy
• 100 J of energy
• 10 J of energy

#9) An ecosystem with the highest biodiversity is considered to be very resistant to climate change. Which of the ecosystems presented would have the GREATEST amount of species STABILITY following a change to the ecosystem from climate change?

• Grasslands
• Taiga
• Tropical Rain Forest
• Desert

#10) Which of the following is most likely to cause a decrease in biodiversity?

• The immigration of species from another ecosytem
• A decrease in the total population of an ecosystem
• An increase in the total population of an ecoystem
• A species extinction in the ecosystem due to climate change