Do organisms "decide" to evolve and change?
Which organisms are most likely to survive?
What does "fitness" mean, in biology?
The type of selection that favors one extreme over another extreme is called
In the graphs above, the red line represents the original population and the change in the population overtime is shown in blue. Which graph best represents a population of light brown snails that became dark brown overtime?
After many generations of sharks eating the fish, the population of fish shifted. Click on all the fish that will be present after natural selection occurred
In the ocean, there are three varieties of fish- small, medium, and large. Fish are eaten by sharks. Sharks tend to favor the medium sized fish because they are the easiest to catch.
Which graph matches the process of natural selection that is occuring in the fish?
A species of moth in England has both a light-colored form and a dark-colored form. In the mid-1800s, the percentage of dark-colored moths increased in areas where black soot from factories covered the trees. The soot in these areas has decreased in more recent times as a result of pollution laws.
Which of the following statements describes what has most likely happened to the moth populations in areas where pollution laws were established (this means there is less soot on trees)?
Blue flying fish live in the upper layers of the ocean. Blue flying fish have enlarged pectoral fins that enable them to glide for 400 meters above the ocean surface and appear to fly.
Which statement best describes how natural selection led to enlarged pectoral fins in blue flying fish?
Farmers spray pesticides on their plants to protect the plants from being eaten by insects. Some individual insects have a genetic mutation that makes them resistant to the toxins in the pesticides.
Which statement best describes how only a few resistant individuals resulted in the pesticide becoming ineffective?
Select the answer below that correctly matches the biomolecules with their function.
One way in which genetically modified mice are developed is by injecting the gene sequence for green fluorescent protein (GFP) into a mouse embryo at a very early stage of development. The injection typically contains genetic material and a biomolecule that catalyzes the reaction.
Which statement BEST classifies the biomolecules responsible for the development of these genetically modified mice?
A student is comparing the function of carbohydrates and lipids. Which cellular function of carbohydrates and lipids should be considered shared between the biomolecules?
What type of natural selection is occurring in the ocean?
What type of natural selection is graph 2 displaying?