Natural Selection

REVIEW OF LAST LESSON

Multiple Choice

Identify the correct definition for an acquired trait

• Characteristics inherited from parents

• Features determined by genetic mutations

• Traits gained during an organism's lifetime

• Qualities influenced by genetic variation

Multiple Choice

Identify the definition of mutations

• Changes in an organism's behaviour

• A small change in DNA

• Inherited traits passed down from one generation to the next

• A molecule that stores genetic information

Multiple Choice

Determine the best explanation for how new variations in genetic traits arise in a population.

• Random mutations cause offspring to look radically different from their parents

• Individuals acquire new traits during their lifetime

• Random mutations cause changes in DNA with each generation

• Individuals with harmful genetic traits die before they can reproduce

Fill in the Blanks

Evolution is the change in

traits

Multiple Choice

Evolution occurs in

• a whole population

• a single organism

Multiple Choice

Evolution occurs

• Over many generations

• Over a single lifetime

Multiple Select

Which 2 are examples of evolution?

• A tadpole turns into a frog

• White fur becomes common in a population of wolves over thousands of years

• A dog learns to sit and stay after weeks of training

• A population of turtles develop longer necks over many generations

Multiple Select

Select 2 reasons why variation is essential

• Genetic diversity increases the population's chance of surviving changes in its environment

• Evolution requires some individuals to have a higher chance of surviving than others

• Evolution requires individuals to have acquired traits that help them survive

• Evolution is when variation in a population is eliminated, so that all individuals are identical

Open Ended

How many BLACK peppered moths can you find?

Open Ended

How many WHITE peppered moths can you find?

Open Ended

How many BLACk peppered moths can you find?

Open Ended

How many WHITE peppered moths can you find?

Poll

What environment is the white moth more likely to survive in?

• Clean environment

• Polluted environment

REVIEW

Open Ended

Define natural selection

Multiple Choice

Two different species have evolved ways of accessing nectar in thin tube-shaped flowers. The hummingbird uses its long beak. The hummingbird hawk-moth uses its long tongue.

Determine which selection pressure likely led to the evolution of the hummingbird's long beak and hawk-moth's long tongue

• Disease

• Access to food

• Hotter climate

• P

Multiple Choice

The Vietnamese mossy frog's green colour helps it blend in with its environment. The frogs are preyed on by snakes.

Determine the most likely effect of this selection pressure over many generations.

• An increase in the number of genetic mutations

• An increase in the variation in skin colour in the population

• An increase in the frequency of the green colour trait

Multiple Select

During the Industrial Revolution, black peppered moths had better camouflage than white moths. Over many generations, black moths became very common in the population.

Explain why this is an example of natural selection by identifying two reasons.

• Predators hunted black and white moths equally

• Camouflage increased the frequency of the white colour trait in the population

• Predators acted as a selection pressure by hunting more white moths than black moths

• Camouflage increased the likelihood of black peppered moths surviving and reproducing