Ques: Q: What important aspect of the scientific method is a suggested explanation for an event, which can be tested? Choices: - scientific control - string theory - independent variable - hypothesis A:
Ans: hypothesis

Ques: Q: What part of a plant protects the plant cell, maintains its shape, and prevents excessive uptake of water? Choices: - chloroplasm - stem - root - wall A:
Ans: wall

Ques: Q: What are specialized cells that are capable of sending electrical as well as chemical signals? Choices: - hormones - ions - enzymes - neurons A:
Ans: neurons

Ques: Q: How do amphibians reproduce? Choices: - asexually - biologically - they don't - sexually A:
Ans:
sexually