What causes the stem cell to differentiate into one or more types of specialized cells? a) mutation of stem cell genes at the time of cell division b) expression of different genes by both cell types c) inheritance of different types of dna by both the cells d) difference in the rate of motorized division in the 2 cells

Darrel conducted an experiment with the following procedure: fill two cups with ice water. place an uninflated balloon snuggly onto your left index finger. blow a little air into an identical balloon, and place it onto your right index finger. place both fingers into the cups of ice water. darrel noticed that his right finger felt warmer in the ice water than did his left finger. which of the following does the experiment show? a. air is a good radiator of heat. b. air is a good insulator of heat. c. air is a good conductor of heat. d. air is a good convector of heat.

In which of the following relationships is one organism always benefited while the other organism is always harmed

What is a photon? a. part of a ribosome b. a light particle c. a carbon dioxide molecule d. part of a chloroplast b. a light particle