Biology Crossword

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Across
  1. 2. A complex molecule composed of amino acids, essential for various biological functions.
  2. 5. All the chemical reactions that occur within a living organism.
  3. 7. System: A group of organs working together to carry out a major body function.
  4. 8. System: A system of cells and tissues that protect the body from infection and disease.
  5. 12. System: A system of glands that secrete hormones to regulate various bodily functions.
  6. 13. A trait that helps an organism survive and reproduce in its environment.
  7. 14. The process in which a male and female reproductive cells combine to form a zygote.
  8. 19. The basic structural and functional unit of life.
  9. 21. The process of change in the inherited characteristics of biological populations over generations.
  10. 22. Reproduction: Reproduction that does not involve the fusion of gametes.
  11. 23. A structure composed of different tissues working together to perform a specific function.
  12. 26. The process by which organisms create new individuals of their own kind.
  13. 27. Reproduction: Reproduction that involves the fusion of gametes
  14. 28. The process by which plants convert light energy into chemical energy.
  15. 29. An unborn offspring of an animal, especially a mammal, in the later stages of development.
Down
  1. 1. A structure within a cell that contains DNA.
  2. 3. Selection: The process by which individuals with traits that make them better suited to their environment survive and reproduce more successfully.
  3. 4. A change in the DNA sequence of a gene.
  4. 6. The study of genes, heredity, and variation in living organisms.
  5. 7. A living individual.
  6. 9. Acid: The basic building blocks of proteins.
  7. 10. A unit of heredity that is passed from parent to offspring.
  8. 11. Deoxyribonucleic acid, the molecule that carries genetic instructions in all living things.
  9. 15. System: A network of nerve cells that transmit signals throughout the body.
  10. 16. The variety of life on Earth at all levels, from genes to ecosystems.
  11. 17. Respiration: The process by which cells break down food to release energy.
  12. 18. The study of the interactions between organisms and their environment.
  13. 20. An early stage in the development of an organism.
  14. 24. A group of similar cells performing a specific function.
  15. 25. A close and long-term interaction between two or more different biological species.