Problem: OPTIONS:
- water
- oxygen
- air
- light
Q: Q: Some plants can detect increased levels of what when reflected from leaves of encroaching neighbors? A:
Answer: light

Problem:OPTIONS:
- LYMPHATIC
- molecules system
- skeletal system
- digestive system

Q: Which system does the large and small intestine belong to? A:
****
A: digestive system

Q: Most oxygen in blood is bound to a protein called what, and carried to the tissues? A:
OPTIONS:
- platelete
- hydrogen
- plasma
- hemoglobin
hemoglobin

Q: What type of feeders are earthworms? A:
OPTIONS:
- middle
- top
- oil
- deposit

Answer: deposit

Question: Q: Most vascular plants are seed plants, also known as? A:
OPTIONS:
- sporozoans
- bacteria
- fungus
- spermatophytes
Answer: spermatophytes

input: OPTIONS:
- mucus
- sedimentation shell
- microscopic shell
- calcareous shell Now, answer this question: Q: What do many mollusks secrete for their protection? A:
A:
output:
calcareous shell