*Question*
If frogs have a relatively complex circulatory system with a three-chambered heart, then what has a relatively complex circulatory system with a three-chambered heart? Answer choices: - frogs - a fish - salmon - alpacas - Man - Birds - sharks - pan
**Answer**
frogs

*Question*
If electrical energy can create carcinogens, then what can create carcinogens? Answer choices: - Pesticides - imagination - Electrical energy - wealth - some viruses - Abnormal cell growth - need - one celled organisms
**Answer**
Electrical energy

*Question*
If oxygen and heat are transported to other parts of the body, then what is transported to other parts of the body? Answer choices: - Organic compounds - ice - oxygen and heat - vital organs - heat energy - Veins and arteries. - electromagnetic energy - cat hair
**Answer**
oxygen and heat

*Question*
If veins carry cells, then what do veins carry? Answer choices: - copper - glucose - Energy - Length - oxygen - warmth - Cells - voltage
**Answer**
Cells