Pre-Assessment: Natural Selection

Which of the following explains how organisms have a trait that makes it more likely for them to survive in a specific environment? (a)  

• Adaptive trait
• Environment trait
• Physical trait
• Survival trait

DROP DOWN: ​ (a)   is a type of molecule that genes and chromosomes are made of.

• DNA
• Molecule
• Matter

DRAG & DROP: ​ (a)   represents everything (living and nonliving) that surrounds an organism?

• Environment
• Natural selection
• Population
• Genetic Variation

If their environment changes to have only long flowers, which of the following hummingbird populations will most likely survive?

• Only population 2 will survive because it is the only population with variation.

• All the populations will survive because the hummingbirds will change the length of their beaks if they need to.

• Populations 1 and 2 will survive.

• Populations 2 and 3 will survive.

Which of the following explains a random change to a gene that sometimes results in a new trait? (a)  

• Mutation
• Natural Selection
• DNA
• Extinct

How did the environment change between time 1 and time 2? How did the population change?

• The water became warm. As a result, ducks with thin feathers were more likely to survive, so the ducks with thick feathers changed to have thin feathers.

• b

  The water became warm. As a result, ducks with thin feathers were more likely to survive, so both kinds of ducks passed on the gene for thin feathers to their offspring.

• The water became warm. With each generation, more ducks with thin feathers survived long enough to pass on the gene for thin feathers to their offspring.

• You cannot tell how the environment changed. With each generation, more ducks passed on the gene for thin feathers to their offspring.

TRUE/FALSE: A lady bug is an example of an organism. (a)  

• True
• False

TRUE/FALSE: Bears are examples as prey. (a)  

• True
• False

How did the environment change between time 1 and time 2? How did the population change?

• You cannot tell how the environment changed. With each generation, more guppies passed on the gene for small spots to their offspring.

• The rocks became smaller. With each generation, more guppies with small spots survived long enough to pass on the gene for small spots to their offspring.

• The rocks became smaller. Guppies with small spots are more likely to survive, so the guppies with large spots changed to have small spots.

• The rocks became smaller. Guppies with small spots are more likely to survive, so both kinds of guppies passed on the gene for small spots to their offspring.

Scientists measured the height of the giraffes in two different populations. Which population has the largest number of tall giraffes?

Responses

• The population in Niger has the largest number of tall giraffes.

• The population in Somalia has the largest number of tall giraffes.

• Both populations have the same number of tall giraffes.

• These bar graphs do not show which population has more tall giraffes.