Scientists were investigating a pond of water found deep in a South
American cave along the Yucatan Penisula. The obtained many
samples which they took back to their lab. After much testing, they
found that the water has an acidic pH of 3. Another much more
surprising discovery was that a new species of unicellular organism
was present in the samples. The organism was observed with a
microscope and found to not have a bound nucleus or organelles. To
which Domain would this organism be classified?

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

The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is

Which line in the graph above best illustrates an effect of the carbon dioxide level in the blood on breathing rate before, during and after a period of exercise? 1.b,2.c,3.a,4.d