*Question*
If bullfrogs are of the class of creatures that were the first true tetrapods, then these belong to the class of creature that were the first true tetrapods:? Answer choices: - millipede - crabs - four limbs - bullfrogs - gastropod - a fish - warm-blooded - insects
**Answer**
bullfrogs

*Question*
If proteins foreign to the body are found on cancer cells and the cells of transplanted organs, then proteins foreign to the body can be found where? Answer choices: - in the lymph nodes - in nerve cells - in the kidneys - on cancer cells - critical organs - mouth of rivers - Earth orbiting the Sun - the skin
**Answer**
on cancer cells

*Question*
If completing a circuit causes electrons to flow through that circuit, then completing a circuit causes _ to flow through that circuit? Answer choices: - heat energy - pulse - heat - photons - complete - energy - Heart rate - electrons
**Answer**
electrons

*Question*
If some viruses have a coating of phospholipids, then what do some viruses have a coating of? Answer choices: - chromosomes - calories - aqueous solution - bioaerosols - acetic acid - phospholipids - DNA - a cuticle
**Answer**
phospholipids