Biodiversity increases the productivity and stability of ecosystems, and biodiversity contributes to ecosystem complexity. Given these facts, an ecosystem's what increases its productivity and stability among the following options: - elevation - complexity - Quality of life - seasons - seasonal changes - Animal survival - trees - Plants growth
complexity

Insulin helps cells take up glucose from the blood, and helps insulin regulate blood sugar. Given these facts, what is regulated by insulin among the following options: - Energy. - animals - Energy - Balance - sleep - heat - sugar - fat
sugar

Q: Cell division often causes growth, and growth can be cancerous, disastrous, or growth can be healthy. Given these facts, cell division can be among the following options: - cycles - haploid - complete - threatened - dormant state - segmented - cancerous - Reproduction
A: cancerous

Question: Bone provides protection for soft tissues and internal organs, and for example the skull bones protect the brain, and the ribs protect the thoracic organs. Given these facts, what protects internal organs among the following options: - Feet - Heart - metal - Masks - fungi - fur - Teeth - Ribs
Answer: Ribs

*Question*
Mating is generally preceded by courtship, and pigeons find one mate then mate for life. Given these facts, what have a period of courtship among the following options: - animals - sharks - pigeons - bacteria - fur seals - judges - h2o - ducks
**Answer**
pigeons

Aship is used for moving people across bodies of water, and an ocean is a large body of water. Given these facts, ships are used to do what on oceans among the following options: - dump air in - take water from - stability - move people across - put seeds in - food and shelter - lowered energy cost - rapid expansion
move people across