How many alleles are there for the main blood types found in the human population?

two alleles

three alleles

four alleles

A force rhat causes mass movement is called A. Distance B. gravity C. Weight D. none of the above

Two glass jars A ana B are filled with carbondioxide and oxygen respectively. In each jar a lightened candle is placed simultaneously. In which jar the candle remain lightened?

Which of these substances is an arrhenius acid? a. c2h6 (g) b. ch4 (g) c. hbr (g) d. koh (s) e. na3po4?

The mean radius of the Earth is 6,371 km, and 70.8% of its surface is covered by water. What is the surface area of the Earth covered by land?

Compared to the radius of a chlorine atom, the radius of a chloride ion is (1) larger because chlorine loses an electron (2) larger because chlorine gains an electron (3) smaller because chlorine loses an electron (4) smaller because chlorine gains

Read the excerpt from a science text. In our experiment, we filled two identical glasses with water. To one glass, we added two tablespoons of salt and stirred. To the other glass, we added four drops of food coloring and stirred.

Carbon can double bond to some atoms to complete its octet. True or false?

What is caused by the heating and coolingof the earth

How do the particlesthat make up an atom interact

A chemistry student needs 55.0g of dimethyl sulfoxide for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the student discovers that the density of dimethyl sulfoxide is ·1.10gcm-3.