I. Fill in the Blanks:1. Friction is caused by___________.2. Copper is

1.	I. Fill in the Blanks:1. Friction is caused by___________.2. Copper is more ___________ reactive than iron.3. The gas usually filled in the electric bulb is_________________.4. ______________ gland is called the master gland5. The structure formed by the fusion of a male gamete with a female gamete is called ______________.
Answer» 1) the interlocking of irregularities in the surface of two OBJECTS 2) IRON displaces copper from its solution 3)nitrogen, argon, or krypton 4)pituitary gland 5)zygote hope it helps

I. Fill in the Blanks:1. Friction is caused by_____.2. Copper is more _ reactive than iron.3. The gas usually filled in the electric bulb is_.4. gland is called the master gland5. The structure formed by the fusion of a male gamete with a female gamete is called ____.

Answer»

1) the interlocking of irregularities in the surface of two OBJECTS

2) IRON displaces copper from its solution

3)nitrogen, argon, or krypton

4)pituitary gland

5)zygote

hope it helps