What would happen if the valves separating the chambers in a person's heart did not close? the volume of blood pumped from the atria to the body would be reduced because blood would backflow into the ventricles. the volume of blood pumped from the ventricles to the body would increase because blood would flow without restriction from the atria. the volume of blood pumped from the ventricles to the body would be reduced because blood would backflow into the atria. the volume of blood pumped from the atria to the body would increase because blood would flow without restriction from the ventricles.

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

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

Overtime the pond slowly becomes more acidic due to the release of chemicals from a nearby factory. which of the organisms would most likely survive the change to their environment?