Q: What is it called when a mistake occurs in dna replication. Choices: - adaptation - degradation - radiation - mutation A:
mutation

Q: Nonflowering vascular plants have how many basic types of leaves? Choices: - four - one - five - three A:
three

Q: Q: What is named after the type of enzyme they interact with in the cell? Choices: - oxygen proteins - function proteins - nitrogen proteins - receptor proteins A:
A: receptor proteins

Question: Q: What occurs when the immune system is not working properly? Choices: - allergy - cancer - anemia - immunodeficiency A:
Answer: immunodeficiency

*Question*
Q: What weather phenomenon, which may bring clouds and precipitation, is created by stalled air masses? Choices: - susceptible front - cool front - Horizontal Front - stationary front A:
**Answer**
stationary front

Q: Q: Tissue is made up of layers of tightly packed cells that line the surfaces of the body, such as skin. Choices: - weak tissue - neural tissue - resultant tissue - epithelial tissue A:
A: epithelial tissue