Within a population, variation increases the likelihood that some individuals will be able to survive if the environment changes. Which of the following causes variations within a population? changes in extinction rates
changes in the genetic material
changes in the breeding rate
changes in the environment

Aglow stick contains a glass vial with chemicals. when the glow stick is bent, the vial breaks and the chemicals react to produce a glow. a science student observes that a glow stick kept in the freezer glows for a longer duration than a glow stick kept at room temperature. what conclusion can be drawn based on the observation? be sure to note the outcome and test variables in the conclusion.

Ill give u brainliest pls how is mass of carbon conserved during cellular respiration

Name a brittle metal , which is used to galvanize iron