Problem: OPTIONS:
- east or north
- west or south
- east or west
- north or south
Q: Q: When warm air rises up to the tropopause, where does it flow? A:
Answer: north or south

Problem:OPTIONS:
- notochord
- skull
- spinal cord
- vertebral column

Q: What do vertebrates possess that is made up of repeating bony units? A:
****
A: vertebral column

Q: Radioactive isotopes are characterized by an unstable what? A:
OPTIONS:
- shell
- proton
- electrons
- nuclei
nuclei

Q: The transmission electron micrograph shows the cell walls where two cells do what? A:
OPTIONS:
- split apart
- reproduce
- disappear
- come together

Answer: come together

Question: Q: Females are not influenced by the male sex hormone testosterone during embryonic development because they lack what? A:
OPTIONS:
- x chromosome
- m chromosome
- z chromosome
- y chromosome
Answer: y chromosome

input: OPTIONS:
- insulation
- high specific heat
- convection
- low specific heat Now, answer this question: Q: Why does a metal spoon heat up quickly when placed in a hot drink? A:
A:
output:
low specific heat