Problem: OPTIONS:
- cysts
- algae
- pigment
- lichen
Q: Q: What organism is an important pioneer on cleared rock and soil surfaces, such as volcanic flows and burned forests? A:
Answer: lichen

Problem:OPTIONS:
- pine - finned fish
- spar - finned fish
- star-finned fish
- lobe-finned fish

Q: What is the second class of fish after ray-finned fish? A:
****
A: lobe-finned fish

Q: How many major massive extinctions have been since life began on earth? A:
OPTIONS:
- three
- four
- one
- five
five

Q: What is a double membrane of the nucleus that encloses the genetic material? A:
OPTIONS:
- the complex envelope
- the cell wall
- the nuclear compression
- the nuclear envelope

Answer: the nuclear envelope

Question: Q: What are organisms that eat just one type of food? A:
OPTIONS:
- gluttons
- hedonists
- devotees
- specialists
Answer: specialists

input: OPTIONS:
- photosynthesis
- meiosis
- puberty
- cell cycle Now, answer this question: Q: What is defined as a repeating series of events that include growth, dna synthesis, and cell division? A:
A:
output:
cell cycle