Why do scientist use the light year instead of astronomical units to measure the distance between stars?

When a collision occurs between two reactant particles that, between them, have the required minimum kinetic energy, or activation energy, a product does not always form. Which of the following reasons explains this? A. low temperature B.

Which of the following is NOT a reason energy decreases at each trophic level? options: Only a certain amount of food is eaten by a consumer. Some food is used as an energy source. Some food can't be digested and exits as waste. none of the above

What is the role of capillaries in the body?

A developing embryo is beginning to develop a male or female reproductive system and all major organs. During which period does this happen

Rue or false: a healthy diet can provide all of the nutrients that you need. true or false: a healthy diet can provide all of the nutrients that you need. a. True b. False

An allele that masks another allele is known as

Is there penicillin in acyclovir

Noah wants to show the largest source of carbon on Earth for his school project. According to his research, in which form is most of the carbon on Earth stored?

True or false: most drugs are eliminated by the kidneys in urine although some are excreted in saliva, sweat, or exhalation. a. True b. False

Do all adaptations result in a change in population? Explain