Q: What phenomenon is essential in order for evolution to occur because it increases genetic variation and the potential for individuals to differ? Choices: - radiation - replication - natural selection - mutation A:
mutation

Q: Saturated and unsaturated are the two main kinds of what? Choices: - sugars - acids - polymers - fats A:
fats

Q: Q: Characterized by a short lifespan, what begin with production in the bone marrow under the influence of csfs and interleukins? Choices: - solutes - pathogens - erythrocytes - leukocytes A:
A: leukocytes

Question: Q: What is the main type of cell in the nervous system called? Choices: - sensory - conduction - axon - neuron A:
Answer: neuron

*Question*
Q: How many years ago may the earliest fungi have evolved? Choices: - .350 million - 500 million - .250 million - 600 million A:
**Answer**
600 million

Q: What phase of a human life does not have a definite starting point? Choices: - adolescence - death - childhood - adulthood A:
adulthood