Across
- 5. If reproduction doesn’t happen, a species becomes_________ . (7)
- 7. “Creepy-crawly” with eight legs. (6)
- 8. Organisms take this in as nutrition. (4)
- 9. This word means that living things are aware of and react to their environment. (8)
- 10. A living thing is also known as an ______ . (8)
Down
- 1. Excretion means getting rid of this. (5)
- 2. Vertebrate animals have one of these. (8)
- 3. This gas is usually needed for respiration. (6)
- 4. This is the basic building block of living things. (4)
- 6. Growth occurs through a process called cell ______ . (8)
- 11. Green plants absorb energy from the _______ . (3)