If skin is used for protecting the body from acids, then what is used to protect the body from acid? Answer choices: - the skin - tube - evaporation - a tongue - electricity - fur and fat - the bones - the mouth
the skin

If amphibians are monophyletic with four limbs, then what are monophyletic with four limbs ? Answer choices: - animals - mammals - amphibians - warm-blooded - Most plants - alpacas - Conifers - graptolites
amphibians

Q: If solar light enters ecosystems, then what enters ecosystems? Answer choices: - an object - Waste - bacteria - Solar light - heat produced - Plastics - Metals - rays or beams
A: Solar light

Question: If bacteria are single-celled organisms that lack a nucleus, then what are single-celled organisms that lack a nucleus? Answer choices: - barnacles - bacteria - Most plants - ferns - orchids - cacti - PDAs - Leeuwenhoek
Answer: bacteria

*Question*
If rivers can slowly dissolve carbon in sedimentary rock, then what can slowly dissolve carbon in sedimentary rock? Answer choices: - rain - rivers - sodium - oil - a solute - SO2 - an ion - fens
**Answer**
rivers

*Question*
If deoxyribonucleic acid contains instructions for proteins and RNA helps assemble the proteins, then what contains the instructions for the proteins? Answer choices: - Something that causes allergies - increases a body's strength - Your sensory system picks it up - flow of electrons - deoxyribonucleic acid - A Greek letter - the body's largest organ - oxidation reaction
**Answer**
deoxyribonucleic acid