Populations and communities

Consumers are organisms that cannot

• Reproduce

• Survive

• Photosynthesize

• Eat

Which of these organisms is the first step of the food chain?

• Producers

• Mammals

• Consumers

• Amphibians

Which of these organisms is a producer?

• Fish

• Flower

• Bear

• Snake

Interactions among populations in a community. The community’s physical surroundings or abiotic factors

• population

• community

• ecosystem

The movement of people from one place to another is called 

• Migration
• Immigration
• Emigration
• Movement

An endangered species is

• One whose numbers are so small that it is at risk of extinction
  
• One whose not been spotted after many years.
• One whose numbers are abundant.

Environmental factors that keep a population from increasing. 

• Carrying Capacity
• Limiting Factors

How could you tell that a population is decreasing in size?

• Its birthrate and death rate remain the same.
• Its death rate is higher than its birth rate.
• Its death rate is lower than its birthrate.
• Its death rate is constant, and its birth rate is increasing.

Which of the following shows the symbiotic relationship between the Rodent and the Bird?  

• Mutualism
• Predation
• Competition
• Commensalism

What organism survives by hunting ?

• prey

• predator

• mutualism

• commensalism