Q: Q: Radioactive isotopes are characterized by an unstable what? A:

OPTIONS:
- shell
- proton
- electrons
- nuclei

A: nuclei

input: OPTIONS:
- transmission
- vibration
- kinetic energy
- acceleration Now, answer this question: Q: What is the measure of change in velocity of a moving object? A:
A:
output: acceleration

Q: What is one way of classifying organisms called? A:

OPTIONS:
- cluster
- tuck
- spasm
- clade

Answer: clade

Problem: OPTIONS:
- fever
- viruses
- pathogens
- bacteria
Q: Q: Antibiotics can be used to fight what, in general? A:
Answer: bacteria

Problem:OPTIONS:
- biologists
- geologists
- anthropologist
- paleontologists

Q: Scientists who find and study fossils are called what? A:
****
A: paleontologists

Problem:OPTIONS:
- never
- at night
- during respiration
- at every crossover

Q: When do end portions of two nonsister chromatids trade places? A:
****
A:
at every crossover