A student wants to determine whether a certain variable affects the rate at which crickets chirp. She counts the number of times different groups of crickets chirp per
minute. She records her data in the table below.

Number of crickets
Amount of food
Size of enclosure
Temperature

Which two groups of crickets can the students use as part of a good experimental
design?

What word is used to describe differences of individual organisms

Rue or false siblings look simila rbecause they each have some traits of their parents.

Select the correct answer. which mutation is harmful to the organism? a. a mutation allowing moths to camouflage better on blackened tree bark b. a mutation making staphylococcus aureus resistant to the antibiotic methicillin c. a mutation inhibiting human immunodeficiency virus from attaching to and entering the cell d. a mutation causing uncontrolled cell division e. a mutation giving plant leaves a bitter taste to discourage herbivores from eating them