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Across 2. name of the male sex cell 7. the singular of ova 8. male sex cell in plants is called this 11. flexible covering of a cell which controls the movement of chemicals in and out of a cell. 12. another word for sex cell

Down 1. found in plant cells and give the plant a green colour 3. organelle that produces energy in a cell 4. female sex cells in plants 5. description of offspring from asexual reproduction 6. cells that have no nucleus and are adapted to carry oxygen 9. Advantage of sexual reproduction - it ensures _____________ in the species. 10. control centre of a cell 13. name of the female sex cell