Which best describes the first organisms on Earth? A. Archaea with simple DNA B. Multicellular prokaryotes C. Simple eukaryotes D. Simple prokaryotes

Researchers investigated the effect of urea on the three-dimensional structure of a certain enzyme. The researchers dissolved the enzyme in an aqueous buffer solution and added urea to the solution.

What is a limitation of using pedigrees for positional cloning?

A nutritionist notices that a patient's diet is lacking in sugars. Which organic group is she referring to? a. lipids b. proteins c. nucleic acids d. carbohydrates

What do people use energy for? a. People use energy to cause massive floods. b. People use energy to create more oil and coal. c. People use energy to play, study, and live. d. People use energy to minimize benefits from the sun.

What is most likely to change with new discoveries and technologies?

When rose meets a new person, she repeats the person's name over and over in her head in an attempt to remember that name at a later time. which part of working memory is activated by this activity?

You are a carbon dioxide molecule floating in the air that is about to enter the stomata of a leaf. Tell the story of your adventure through photosynthesis in the leaf, and then through cellular respiration after the plant is consumed by a rabbit.

Two different species of birds live in the same habitat would be the same type of nesting place. As a result, both species will

Which of the following is NOT a type of synovial joint in the human body? A. pivot B. stirrup C. hinge D. gliding

What blood types are possible among the children of a cross between a man of blood-type A and a woman of blood-type B?