If the heart becomes damaged or weakened, how will this affect the body’s systems? The circulatory system will not function well, which will affect all other body systems.

Only the circulatory and respiratory systems will be affected.

Only the nervous system will be unable to function.

The muscular system will strengthen the heart.

Dr. kaylan is an ecologist who studies bird behavior. she sets up an experiment to test which type of food crows are most likely to eat when given a choice between walnuts, corn, and sunflower seeds. to perform her experiment, dr. kaylan places three food bins in an area frequented by cows. each bin contains one of the three food types. then, she measures how much of each food type is eaten every day for a month and summarizes the results of her experiment in the pie chart below. based on her results, dr. kaylan concludes that crows choose to eat corn more frequently than other food sources because it has a higher nutritional value. what is a reasonable alternate conclusion that can be drawn from dr. kaylan's data

Anormal strand of dna is shown below, followed by the same strand of dna after mutations have occurred.

How and why organisms are hierarchically classifies