Survivorship Curves and Population Dynamics

The video tutorial by Mr. S covers the concept of survivorship curves, explaining the three types: type 1, type 2, and type 3. It relates these curves to r and k selected species, providing examples such as trees, humans, and birds. The tutorial outlines the learning objectives, emphasizing the ability to explain survivorship curves and analyze data patterns. It also introduces the concept of carrying capacity and population growth, preparing students for a practice question on survivorship trends.

What is a survivorship curve?

• A graph showing the number of births in a population over time.

• A line that displays the relative survival rates of a cohort from birth to maximum age.

• A chart that shows the migration patterns of a species.

• A diagram illustrating the food chain in an ecosystem.

Which type of survivorship curve is characterized by high survivorship early in life?

• Type 4

• Type 3

• Type 2

• Type 1

What type of species typically follows a Type 3 survivorship curve?

• Humans

• Birds

• Whales

• Insects

What is carrying capacity?

• The rate at which a population grows.

• The average lifespan of a species.

• The total number of species in an ecosystem.

• The maximum number of individuals an environment can support sustainably.

How does environmental resistance affect population growth?

• It increases the birth rate.

• It decreases the death rate.

• It limits the growth rate as resources become scarce.

• It has no effect on population growth.

What happens when a population overshoots its carrying capacity?

• The population stabilizes immediately.

• The population may experience a decline or oscillate around the carrying capacity.

• The population continues to grow indefinitely.

• The population becomes extinct.

What is exponential growth in a population?

• A constant population size over time.

• A decrease in population size due to limited resources.

• A rapid increase in population size that exceeds the carrying capacity.

• A steady increase in population size over time.

Which of the following is an example of a K-selected species?

• Dandelions

• Humans

• Mosquitoes

• Bacteria

What is the main focus of the data analysis exercise in the video?

• Identifying different species in an ecosystem.

• Analyzing the food web of a specific habitat.

• Describing trends in survivorship curves and justifying the type of curve represented.

• Calculating the birth rate of a population.

What is the relationship between biotic potential and carrying capacity?

• Biotic potential is always higher than carrying capacity.

• There is no relationship between biotic potential and carrying capacity.

• Carrying capacity is determined by biotic potential and environmental resistance.

• Biotic potential decreases as carrying capacity increases.