Natural Selection Quiz- A

What word describes a trait that helps an organism survive in its environment?

• natural selection

• mutation

• camouflage

• adaptation

Which best defines fitness?

• How strong an organism is

• The ability to survive, find a mate, and produce offspring

• Being able to escape from predators

• How muscular an organism is

____________________ is needed for natural selection to make a new species.

• Inherited variation

• Long life span

• Static Environment

• Unlimited Resources

Why would it beneficial for a fish to lay 1000 eggs instead of just 10?

• It increases opportunities for offspring to compete with limited resources

• It increases the probability that some offspring survive and reproduce

• It increases the probability that moving water promotes gene flow

• It increases the recombination of alleles to cause genetic drift

A chemical spill causes the offspring of ladybugs to have blue dots instead of black dots. What is this an example of?

• Natural Selection

• Genetic Drift

• Mutation

• Gene Flow

A certain type of plant can produce blue or yellow flowers. During a fire, many yellow flowers are destroyed and now since blue is the dominant trait, the plant reproduces offspring that produce only blue flowers. What is this an example of?

• Non-Random Mating

• Gene Flow

• Mutation

• Genetic Drift

Which combination of characteristics in a population would provide the greatest potential for evolutionary change?

• Small population, low mutations rates

• Large population, low mutation rates

• Small population, high mutation rates

• Large population, high mutation rates

Antibiotics are used to kill S. aureus, a species of bacteria that causes the staph infection (symptoms include redness, heat, and painful sores around the infection site). However, some of the bacteria have a mutation that makes them resistant to the antibiotic.

Which statement best describes how only a few resistant individuals can result in the antibiotic becoming ineffective?

• The resistant bacteria emit a chemical that makes it safe for other bacteria

• The resistant bacteria are able to survive and reproduce to create a population that is also resistant.

• The resistant bacteria as an individual becomes immortal, but does not reproduce.

• The resistant bacteria produce stronger symptoms than the other bacteria.

Some organisms have adaptations to help them survive and reproduce. If these genes also help their offspring increase their fitness, what will also increase?

• The frequency of the beneficial genes in an individual

• The frequency of the beneficial genes in the population

• The number of genes in one chromosome

• The number of genes in the species.

A harmless snake looks similar to a venomous snake, an adaptation known as mimicry. The outcome of this adaptation is to do what?

• To make it easier for the harmless snake to attract prey

• To make it easier for the harmless snake to interbreed with the venomous snake.

• To allow the harmless snake to blend in with the surrounding environment

• To protect the harmless snake from predators.