A Hertzsprung-Russell diagram is provided.

In comparison to the Sun, which of the following best describes Betelgeuse?
Group of answer choices

Smaller in diameter

Cooler and brighter

Brighter and hotter

Less bright, but hotter

Consider the diagram below, which represents components of the biosphere. what do the two arrows in the diagram most likely represent? a. radiation b. photosynthesis c. cellular respiration d. energy conversions will give to anyone who answers quickly

Epinephrine is a hormone released from the adrenal gland of the body, most often in a stressful situation. it is known as the "fight-or-flight" hormone. one way that it causes a response in the body is to activate receptors on muscle cells. where are these cellular receptors located? a. on the cell membrane b. in the nucleus c. on the cell wall d. around the mitochondria

Match the types of competition to their descriptions