*Question*
If some deuterostomes lack respiratory systems, then some what lack respiratory systems? Answer choices: - Smoking - respiratory systems - deuterostomes - cigarettes - alpacas - hawks - barnacles - pigs
**Answer**
deuterostomes

*Question*
If energy conversion releases water, then what is released by energy conversion? Answer choices: - photons - waves - A drug. - Light - oxygen - heat - water - energy
**Answer**
water

*Question*
If making an object hot causes thermal expansion, then what causes thermal expansion? Answer choices: - Electrical energy - energy of moving objects - making an object hot - cooling an object - freezing an object - chemical reaction - global warming - stretching an object
**Answer**
making an object hot

*Question*
If waxy leaves are used for water conservation by some plants, then what do some plants use waxy leaves for? Answer choices: - staying warm - petals - nutrients - Chemical energy - Exfoliation - carbon monoxide - water conservation - water evaporation
**Answer**
water conservation