Ques: Q: What is a double membrane of the nucleus that encloses the genetic material? Choices: - the complex envelope - the cell wall - the nuclear compression - the nuclear envelope A:
Ans: the nuclear envelope

Ques: Q: The coordinated activities of the legume and the rhizobium bacteria depend on what between the partners? Choices: - electric signals - sight signals - fertilizer signals - chemical signals A:
Ans: chemical signals

Ques: Q: What is the energy needed to start a reaction between catalysts and reactants called? Choices: - reaction energy - decomposition energy - conductivity energy - activation energy A:
Ans: activation energy

Ques: Q: What is the cause of the "heartburn" that occurs when acidic digestive juices escape into the esophagus? Choices: - toxic reflux - acidic buildup - acid pressure - acid reflux A:
Ans:
acid reflux