Biology Semester 1 Final Exam

Front

What is a limiting factor in an ecosystem?

Back

A limiting factor is a resource or condition that limits the growth, abundance, or distribution of an organism or a population of organisms in an ecosystem.

Front

Which of the following is NOT a limiting factor?

Back

Increase in birth rate.

Front

What type of limiting factor is flooding?

Back

Density-independent limiting factor.

Front

What shape does a population growth curve take when it reaches carrying capacity?

Back

S-shape.

Front

What is the active site of an enzyme?

Back

The area of an enzyme that binds to a substrate.

Front

What are homologous structures?

Back

Structures with the same parts that have different functions, suggesting a common ancestry among organisms.

Front

What is adaptive radiation?

Back

The process by which organisms diversify rapidly into a wide variety of forms to adapt to different environments.

Front

What is a vestigial structure?

Back

A structure that has lost most or all of its original function through the course of evolution.

Front

What is the difference between density-dependent and density-independent factors?

Back

Density-dependent factors are influenced by the population size (e.g., competition, predation), while density-independent factors affect populations regardless of their size (e.g., natural disasters).

Front

What is carrying capacity?

Back

The maximum number of individuals of a species that an environment can support sustainably.