Question

Which statement would least likely be used to describe variation?


Variations are inherited differences between individuals of the same species.

Variations that decrease reproductive success are more likely to be passed on.

Variations may result in changes to an entire population after many generations.

Variations provide some individuals with an advantage.

Answer 1

What do you think the answer is @trueswagga16

Answer 2

Scientific investigations often lead to the formulation of new scientific questions. The observations Charles Darwin made during his time aboard the H.M.S. Beagle prompted him to ask which question?


Do living organisms change over time and, if so, how?

Are the finches of the Galapagos Islands the same as those on the mainland?

Can selective breeding occur in nature?

Can the accumulation of gradual changes in a population lead to a new species over time?

A biology teacher asks students to give examples of genetic variations that support the idea that changes in a population’s environment affect genetic variation. Which is the least supportive example?



changes in genetics in human populations

antibiotic resistance in bacteria populations

pesticide resistance in garden insects

changes in the color of the peppered moth population in England

A group of students are walking in the park, and one of them takes a picture of a pollen grain that is being blown by the wind. What caption can the student use for this picture?



gene mutation in action

gene flow at work

genetic drift as it happens

natural selection in progress
Which organisms are most likely to survive in a population in which disruptive selection is occurring?



organisms that have average traits

organisms that have extreme traits

organisms that are sexually selected

organisms that are the largest and strongest

Thylacosmilus is a marsupial, and Smilodon is a mammal. Thylacosmilus and Smilodon both have saber teeth, but they do not share an ancestor that had saber teeth. What are saber teeth for these organisms?


analogous structures

homologous structures

vestigial structures

mutated structures

A population of squirrels lived together in a forest. An event occurred that caused the population to diverge into two different species over a long period of time. Which of the following is most likely the event that occurred?



There was an increase in the predators in the forest.

A natural disaster occurred that separated squirrels.

The winters were unusually cold in the forest.

A disease affected the squirrel population in the forest.

What did Jean-Baptiste Lamarck believe about traits such as large muscles that are acquired during one's lifetime?


They are acted on by natural selection.

They can be passed on to offspring.

They are shared equally by all offspring.

They are the result of a change of alleles.

A scientist is studying an infectious agent in a lab. Which observation best illustrates the importance of the theory of evolution in the field of medicine?


Organisms in Petri dish A have a mechanism that produces the same neurotoxin as the rest.

Organisms in Petri dish B have the largest cells relative to the rest.

Organisms in Petri dish C have twice as many genes on their DNA.

Organisms in Petri dish D have a mutation that allows them to survive treatment with medication.

Answer 3

1 question per box please..

Answer 4

my bad.. I think its c