male guppies found in areas without predators are more colorful than the ones found in locations with large predator populations a population of adult guppies originating from an area with a large number of predators is transferred to a nearby area with few predators

Which of the following examples can cause gene flow between populations? a. an increase in predators to a population of zebra b. a volcanic eruption that kills half of a population of mice c. bird droppings that contain seeds from a different location d. a person that sprays a toxin on a group of mosquitoes

Identify the type of energy used in each action. the flexing of an arm muscle: a signal transduction process by a neuron: a ball at the top of a hill: 1. electrical energy 2. mechanical energy 3. gravitational potential energy

Which zone within the open-ocean zone is home to the most organisms? deep zone surface zone intertidal zone transition zone