A substance has a half-life of 100,000 years and an initial mass of 1,000 grams. how many years will pass before only 250 grams of the substances parent material is left?

Human microbiota resides in the a. intestines. b. kidneys. c. liver. d. cerebral spinal fluid.

You coat a Petri dish with fibronectin and proteoglycans and then culture cells on the dish. The cells adhere to the dish.

What is contained in the xylem tissues that travel from the roots to the leaves? A. Water and inorganic ions B. Water and organic molecules C. Organic molecules and inorganic ions

Why are so many other living things depending on plant like protists?

Why are valves found in veins, but not in capillaries or arteries?

A scientist notices that a person has two recessive genes for a trait. This describes the person's A) phenotype B) genotype C) traits D) characteristics

Which area of the brain has been associated with sadness, anxiety, and depression?

How does a genotype differ from a genotype?

Which rays of the electromagnetic spectrum are responsible for causing sunburn when you spend too much time exposed at the beach? A) Ultraviolet B) X-rays C) Gamma D) Visible E) Infrared Correct answer will be given the Brainliest! : D

Food and medical procedures can expose people to radiation. Therefore, the effects of radiation from a nuclear power plant are not a reason for concern. True False