Horses and donkeys mate successfully to produce mules, which are always sterile. which genetic isolating mechanism is involved here to prevent horses and donkeys from becoming a single species

What heat is removed how does a gas become a liquid

In dna, only the_ varies from one nucleotide to another. base phosphate sugar amino acid

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