Problem: OPTIONS:
- waste plankton
- land plankton
- source plankton
- marine plankton
Q: Q: The diatoms are unicellular photosynthetic protists that encase themselves in intricately patterned, glassy cell walls composed of silicon dioxide in a matrix of organic particles. these protists are a component of freshwater and these? A:
Answer: marine plankton

Problem:OPTIONS:
- countries
- system
- tissue
- population

Q: What is made up of organisms of the same species that live in the same area? A:
****
A: population

Q: Photosynthesis is initiated by what hitting plants? A:
OPTIONS:
- dirt
- air
- moisture
- sunlight
sunlight

Q: What element on the periodic table forms the most diverse compounds? A:
OPTIONS:
- helium
- oxygen
- hydrogen
- carbon

Answer: carbon

Question: Q: What are polymers composed of many sugar building blocks called? A:
OPTIONS:
- monosaccarides
- monomers
- hydrocarbons
- polysaccharides
Answer: polysaccharides

input: OPTIONS:
- toxic reaction
- spontaneous mutation
- hormonal reaction
- chemical reaction Now, answer this question: Q: What occurs when some substances change chemically to other substances? A:
A:
output:
chemical reaction