a rock sample contains 25 percent k-40 and 75 percent daughter product ar-40. if k-40 has a half-life of 1.3 billion years, how old is the rock?

Professor Tan studies quality in streams near chemical power plants. which is a type of qualitative data that professor Tan should record during these studies? a. the pH of the water b. any occurrences of unusal odors c.

Detached earlobes are dominant. The mother's genotype is EE and the father's genotype is ee. What is the chance that he will have detached earlobes? 25% chance 50% chance 75% chance 100% chance

What geologic forces shaped Michigan?

Which takes place inside the chloroplast? light and dark reactions light reaction only light reaction and cellular respiration dark reaction only

What single characteristic does all life on earth have in common? A - all organisms use the same process to produce lipids B-all organisms transfers hereditary information through proteins C-all organisms transfers hereditary information through Dna

Meiosis is a specialized form of cell division that that produces

Gee's arm was cut during an industrial accident. the blood was pouring from the wound in spurts. which type of vessel was severed?

Why does Betelgeuse have a much greater absolute magnitude than apparent magnitude?

The cell's nucleus is filled with a substance called protein.

How are genes related to chromosomes?