If reptiles have a complete digestive system and a closed circulatory system, then what have a complete digestive system and a closed circulatory system? Answer choices: - viruses - reptiles - phytoplankton - mammals - bacteria - graptolites - humans - elephants
reptiles

If carbon, oxygen, and hydrogen can be combined with fatty acids, then what can fatty acids be combined with, in addition to carbon and oxygen? Answer choices: - Sodium - Energy. - glucose - Carbon Dioxide - Fuel cells - Uranium - Hydrogen - Energy
Hydrogen

If the immune system is a defense against harmful particles from entering the body, then the what is a defense against harmful particles from entering the body? Answer choices: - lungs - It remains dormant - A virus - immune system - exoskeleton - pancreas - chickenpox - liver
immune system

If mushrooms have special structures for penetrating a host, then what have special structures for penetrating a host? Answer choices: - a cuticle - orchids - parasites - alveoli - ferns - bacteria - epidermal - Mushrooms
Mushrooms