*Question*
Q: For feeding, the head contains one pair of mandibles and two pairs of what? Choices: - tracheae - antennae - chelicerae - maxillae A:
**Answer**
maxillae

*Question*
Q: What paired organs that are part of the urinary system play the prime role in excretion? Choices: - ovaries - liver - lungs - kidneys A:
**Answer**
kidneys

*Question*
Q: Methanogens in their gut enable what process in cows? Choices: - absorption - excretion - regeneration - digestion A:
**Answer**
digestion

*Question*
Q: What kind of air does a continental polar air mass hold? Choices: - cool moist air - frigid wet air - warm dry air - cold dry air A:
**Answer**
cold dry air