1. An unfertilized egg is also known as _______.   ovule   ovum   ovary   Hint Half-n-half Clue   2. The salmon belongs to which of the following classes of vertebrates?   Mammals   Fish   Amphibians   Half-n-half Clue   3. Which of the following animals travels from the sea up a river in order to spawn?   Newt   Lemming   Salamander   Oyster   Salmon   Half-n-half Clue   4. A home for ants is known as _______.   a vivarium   a formicarium   an aquarium   Half-n-half Clue   5. The _______ mosquito feeds on plant juices.   female   male   6. Pick the "odd one out" (with reference to vertebrates and invertebrates).   Shrimp   Eagle   Newt   Piranha   Lizard   Half-n-half Clue   7. The useful work of the bees in gardens is to _______.   aerate the soil   feed on the greenfly   pollinate the flowers   Half-n-half Clue