True or false Earth's crust sits on top of the mantle.

Why are cancer cells harmful? Select all statements that apply. A. They absorb nutrients needed by other cells. B. They block nerve connections. e block nerve connections C. They prevent organs from functioning properly. D.

How many electrons orbit around the nucleus

The endocrine system acts through chemical messengers called - - a. Tissue b. Blood cells c. Neurotransmitters d. hormones

Which is an enviornmental factor that affects skin color in humans

Why does the rate of cellular respiration decrease quickly at temperatures higher than 40°C? Enzymes that perform cellular respiration denature. Glucose becomes much less soluble in the blood.

What traits were used to identify shark and ray families?

Beriberi is caused by a deficiency of thiamine in the diet. Severeberiberi causes an increase in pyruvate concentrations in blood and urine. Explainthis observation.

Which of the following is an example of primary waste prevention? A homeowner burns lawn waste to get rid of it. A family donates used clothing to a second-hand store. An aluminum soda can is recycled.

Which best describes the ovary? a-It produces progesterone. b-It does not influence breast development. c-It produces testosterone. d-It is the location for egg fertilization.

What is a disadvantage of parthenogenesis