A petrified bone is composed of calcium True or false?

Which theory suggests that the basic unit of life is the creature or organism, which may be divided into cells? cell theory organismal theory

Which of the following is NOT a long-term effect of mining in the Picher Mining District? A. Increased levels of lead in the blood stream B. Increased incidents of kidney disease C. Increased levels of particulates in the air D.

Which describes a disadvantage of sexual reproduction? a. inherits traits for better survival b. has variation in genetic backgrounds c. takes longer for new individual to develop d. is genetically identical to parent

Populations of Caribbean coral have decreased significantly over the past 30 years due to disease. Which of the following is most likely a major factor leading to the increased amount of disease in the coral?

A man with blood a Marie's a woman with blood o and the daughter has blood group O. Is the information enough to tell u which of the traits blood group a or I is dominant what or why not

If a molecule is too large to slip through the spaces in the membrane, how will that molecule enter the cell? A. The molecule will shrink so that it can fit in the spaces. B. The molecule will move through a protein channel. C.

Consider the cell cycle; which stage takes pretty much the same amount of time regardless of cell type? Explain

Which of the following best describes the result of meiosis II

What is the principal male sex hormone

Animal species of the tropical rain forest Select one: have adaptations to cope with extreme variations in climate. have adaptations that minimize competition. compete more for available resources than species native to other biomes do.