Biology Chapter 10

Question 1

what is birthrate?

Answer 1

The number of individuals born within a population per unit time.

Question 2

what is cohort?

Answer 2

A group of organisms that share common characteristics and are studied over time.

Question 3

what is Population Dynamics?

Answer 3

CHANGE

Question 4

what generates Population dynamics?

Answer 4

increase and decrease in the number of individuals in a population over time.

Question 5

Birth and immigration cause a population to?

Answer 5

INCREASE

Question 6

Death and emigration cause a population t?

Answer 6

DECREASE

Question 7

Population size equation=

Answer 7

Nt=Nt-1 + B + I - D - E
Nt= number of individuals at time t
Nt-1= # of individuals at previous time t-1
B= # of individuals born
I= # of individuals that immigrated into population
D= # of individuals that died
E= # of individuals that emigrated from the population.

Question 8

what is dispersal?

Answer 8

Movement of individuals of a population to new locations.

Question 9

Explain the critical role that dispersal can play in a population dynamic-

Answer 9

-Can increase or decrease local population densities