Populations and ecosystems

HideShow resource information

1. What is a community?

  • All the populations of different organisms living and interacting in a particular place at the same time
  • All the organisms of one species living in a particular place at the same time
  • All the organisms of one species over the whole Earth
  • Any collection of organisms
1 of 16

Other questions in this quiz

2. What does average life expectancy mean?

  • The average age at which 50% of the individuals in a particular population are still alive
  • Average number of years of life for anyone, changed every 100 years
  • The average age that a person will die, taken from the national census
  • An estimate based on factors including wealth, health of the individual and lifestyle factors

3. What is the term for changes in a human population?

  • Demographic transition
  • Demographic differences
  • Population growth rate
  • Birth rate - death rate

4. How would you estimate a population size from mark-release-recapture?

  • [no. individuals in first sample * no. in second sample]/no. marked individuals recaptured
  • [no. marked individuals * no. marked individuals recaptured]/no. individuals in first sample
  • [no. marked individuals recaptured * no. in second sample]/no. individuals in first sample
  • [no. marked individuals recaptured * no. in first sample] *100

5. What could increase human birth rate?

  • A higher proportion of people studying at university
  • Social/cultural practices
  • More contraception
  • Pets

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Ecology, ecosystems and environmental biology resources »