Q: Q: Shark teeth likely evolved from the jagged scales that cover their skin, called what? A:

OPTIONS:
- heterotroph scales
- hook scales
- pinworm scales
- placoid scales

A: placoid scales

input: OPTIONS:
- manipulates the cell
- migrates the cell
- destroys the cell
- elongates the cell Now, answer this question: Q: A mitotic spindle forms from the centrioles and passes through the nuclear membrane, which remains intact. chromosomes attach to the mitotic spindle, which separates the chromosomes and does what? A:
A:
output: elongates the cell

Q: What is the force that slows down or stops motion? A:

OPTIONS:
- resistance
- tension
- thrust
- friction

Answer: friction

Problem: OPTIONS:
- higher birth rates
- higher expatriation
- higher death rates
- reduced family size
Q: Q: What is the key to the demographic transition? A:
Answer: reduced family size

Problem:OPTIONS:
- plasticity
- vitality
- tension
- cohesion

Q: What is the property by which water molecules stick together? A:
****
A: cohesion

Problem:OPTIONS:
- heart
- liver
- bladder
- brain

Q: What organ has four ventricles, all of which developed from the original hollow space within the neural tube? A:
****
A:
brain