A certain species of sea otters lives off the coast of Alaska. Some have the ability to tolerate the colder waters farther north while others stay in the central coastal area. As a result of a large oil spill along the northern coast, most of the otters living in those colder waters die. Afterwards, the population of otters, in general, is now less tolerant of cold water.Is this an example of natural selection?
No
Which type of speciation occurs when a physical or chemical sign is required before a species will mate?
Behavioral
When biologists use the term, "survival of the fittest," what do they mean by "fit"?
Having traits that help an organism produce healthy offspring
In most animals wisdom teeth are functional and important to the animal. In humans they have no clear purpose. What is this an example of?
Vestigial structures
As a lion gets older, its nose turns black. Is this an example of biological evolution?
No
What types of mutations involves a portion of the DNA in the mutated chromosome being rearranged?
Inversion mutations
Wasps and bats both have wings that help them fly, but their wings are formed in different ways. What would scientists call their wings?
Analogous structures
What is NOT a similar feature between the fossils of birds and the fossils of dinosaurs?
Eye socket
What type of speciation occurs when mating produces offspring that can't reproduce?
Hybrid sterility
Are all of Darwin's ideas accepted today as scientifically correct?
No
What is the best definition for biological evolution?
Genetic change in a population of organisms over time
Two butterflies mate and a genetic mutation causes the offspring to be a different color. Is this an example of biological evolution?
No
What must be true for a mutation to change the gene pool of a particular species?
The mutation must have a physical effect
What is the best example of a vestigial structure?
The tailbone of a human