If an ecosystem's complexity increases its productivity and stability, then an ecosystem's what increases its productivity and stability? Answer choices: - elevation - complexity - Quality of life - seasons - seasonal changes - Animal survival - trees - Plants growth
complexity

If sugar is regulated from insulin, then what is regulated by insulin? Answer choices: - Energy. - animals - Energy - Balance - sleep - heat - sugar - fat
sugar

Q: If cell division can be cancerous, then cell division can be? Answer choices: - cycles - haploid - complete - threatened - dormant state - segmented - cancerous - Reproduction
A: cancerous

Question: If ribs protect internal organs, then what protects internal organs? Answer choices: - Feet - Heart - metal - Masks - fungi - fur - Teeth - Ribs
Answer: Ribs

*Question*
If pigeons have a period of courtship, then what have a period of courtship? Answer choices: - animals - sharks - pigeons - bacteria - fur seals - judges - h2o - ducks
**Answer**
pigeons

If ships are used to move people across oceans, then ships are used to do what on oceans? Answer choices: - dump air in - take water from - stability - move people across - put seeds in - food and shelter - lowered energy cost - rapid expansion
move people across