Which of the following is a component of the plasma membrane that creates a chemical barrier between the inside and the outside of the cell?

cholesterol

water

proteins

phospholipids

Where is the DNA for an organism found

Which of the following statements about biodiversity is true? a. Changes to biodiversity always positively affect an ecosystem. b. Changes to biodiversity always negatively affect an ecosystem. c.

Explain two positive things environmental impacts of composing

Are kelp crabs herbivores, carnivores, or omnivores?

Which of the following happens firstwithin an animal response? A. Interneurons receive and process information about the stimulus. B. Motor neurons carry directions from interneurons to muscle cells. C. Sensory neurons sense a stimulus. D.

Which of these nerves does not arise from the cervical plexus? median nerve greater auricular nerve phrenic nerve supraclavicular nerve?

An experimental protocol requires that a nutrient deficiency be induced to assess its effects on memory. What is the most appropriate study design to use to address this question? a. randomized controlled trial b. epidemiological study c.

Which of the following statements concerning enzymes is FALSE? A) They are usually, but not always, proteins. B) They function best at 37°C. C) They can be denatured if the pH of their environment is too high or too low.

What is Infrared radiation?

1. Define isometric contraction and describe an example Isometric contraction occurs when the muscle is activated but held at a fixed length. An example would be the muscles of the leg when holding oneself in a squat position. 2.