Biology Exam Practice

What is a species?

• a group of organisms like one another that can reproduce and have fertile offspring

• a group of organisms like one another that cannot reproduce or have fertile offspring

• a group of organisms that produce asexually

• a group of organisms that produce sexually

What are the 5 mechanisms of evolution?

• mutation

  gene flow

  random mating

  genetic change

  no natural selection

• genetic drift

  gene switch

  non random mating

  natural selection

  no mutations

• genetic change

  gene switch

  random mating

  natural selection

  mutation

• genetic drift

  gene flow

  non random mating

  natural selections

  mutation

What are the 5 conditions that need to be met in order to be in Hardy-Weinberg equilibrium?

• mutations

  mate non randomly

  population is small

  natural selection

  migration

• no mutations

  mate randomly

  no migration (in or out)

  population is infinitely large

  no natural selection

• small population

  no natural selection

  no mutations

  migration

  mate non randomly

• infinitely large population

  natural selection

  no migration

  mate randomly

  mutations

What is the Hardy Weinberg equilibrium?

• p+q=1

  p+2pq square+q=1

• p+q=1

  p+2pq+q=1

• p+q=1

  p squared +2pq+q squared=1

• p-q=1

  p+2pq+q=1

What is a gene pool?

• a populations partial collection of genes and their alleles

• a populations entire collection of genes and their alleles

• a populations entire collection of chromosomes and DNA

• a populations partial collection of chromosomes and DNA

Why is the Hardy Weinberg equilibrium useful?

• used to observe no evolution occurs

• uses as a basis of comparison to observe macroevolution

• use as a basis of comparison to observe micro evolution

• it is no useful

What are the two forms of sexual selection? Describe them.

• Intrasexual- competing

  Intersexual- multiple looks

• Intrasexual- multiple looks

  Intersexual- competing

• Intrasexual- attraction

  Intersexual- random mating

• Intrasexual-random mating

  Intersexual-attraction

What does Descent with Modification explain?

• environmental factors that change an ancestral type

• rapid changes over a short period of time from ancestral type

• reproduction between two ancestral types

• gradual changes through time from ancestral type

What is compression fossilization?

• leaf sinks, fine sediment covers leaf forming rock

• minerals replace organic matter turning to stone

• organism is pressed against soft sediment making an indent

• imprint fills with mdu and hardens into rock

Give an example of gene flow.

• genetic drift

• overhunting

• migration

• deforestation