"fifteen hundred years ago everybody knew the earth was the center of the universe. five hundred years ago, everybody knew the earth was flat, and fifteen minutes ago, you knew that humans were alone on this planet. imagine what you’ll know tomorrow.” agent kay's statement illustrates that theories are a) always true. b) constantly changing. c) describe what happens in the natural world. eliminate d) are proven by evidence collected by scientists.

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

Explain why phospholipid molecules form a bilayer. (3 marks)

The is an estimate of the fewest number of organisms a population needs to avoid extinction. this measurement will most if the number of offspring each female in the population produces increases. if the population's this measurement will most likely increase. 1 population density, minimum viable population, carrying capacity 2 decrease, be unaffected, increase 3 death rate increase, dead rate decrease