Question

an organism has two different possible traits, a and b. a graph of the population is shown right. which of the following statements is true about trait b? check all that apply. it decreased in frequency over time. it became extinct. it is carried on a recessive allele. complete there was a change in the environment between generations 10 and 30. the change likely. done

Explanation:

For the first part about Trait B:

• "It decreased in frequency over time" is true as the graph (partial shown) likely shows its population (orange, assuming Trait B is orange) decreasing.
• "It became extinct" is false as the population doesn't reach zero.
• "It is carried on a recessive allele" can't be confirmed from the graph alone (no info on genetics like allele dominance).

For the environment change between generations 10 - 30: A common scenario with trait frequency change (Trait B decreasing, Trait A increasing) is environmental change favoring Trait A (e.g., new predator, resource change) so the change likely "favored Trait A over Trait B" (or similar, but since the dropdown is to be filled, the logical answer is an environmental change that gave Trait A a survival/reproductive advantage, causing Trait B's frequency to drop).

Answer:

For the first part (checking statements): The true statement is "It decreased in frequency over time".

For the environment change: The change likely "favored Trait A over Trait B" (or a similar description indicating environmental selection for Trait A, against Trait B).