Biology Overview

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Across
  1. 6. The organ inside the head that controls all body functions of a human being
  2. 9. occurs when the same trait is present in two lineages that lack a recent common ancestor
  3. 10. the firm nonliving layer that encloses and supports the cells of most plants, bacteria, fungi, and algae
  4. 12. a fist-sized organ that pumps blood throughout your body
  5. 13. a long DNA molecule with part or all of the genetic material of an organism.
  6. 16. A specific physical region or amino acid sequence in a protein which is associated with a particular function or corresponding segment of DNA.
  7. 17. a type of cell division in sexually reproducing organisms that reduces the number of chromosomes in gametes
  8. 18. the scientific study of genes and heredity
  9. 20. is a collection of tissues joined in a structural unit to serve a common function. In the hierarchy of life, an organ lies between tissue and an organ system.
  10. 22. the smallest unit that can live on its own and that makes up all living organisms and the tissues of the body
  11. 24. An unborn offspring that develops and grows inside the uterus (womb) of humans and other mammals
  12. 27. rigid or articulated envelope that supports and protects the soft tissues of certain animals
Down
  1. 1. a microscopic network of protein filaments and tubules in the cytoplasm of many living cells, giving them shape and coherence.
  2. 2. is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's activities.
  3. 3. This is the condition of optimal functioning for the organism and includes many variables, such as body temperature and fluid balance, being kept within certain pre-set limits.
  4. 4. is the scientific study of functions and mechanisms in a living system
  5. 5. Eukaryotic cells usually have a single nucleus, but a few cell types, such as mammalian red blood cells, have no nuclei, and a few others including osteoclasts have many.
  6. 7. has three related meanings. Firstly, it is the dynamic evolutionary process of natural selection that fits organisms to their environment, enhancing their evolutionary fitness. Secondly, it is a state reached by the population during that process.
  7. 8. made up of one or more atoms
  8. 9. the presence of a single set of chromosomes in an organism's cells
  9. 11. a mineralized connective tissue that exhibits four types of cells: osteoblasts, bone lining cells, osteocytes, and osteoclasts
  10. 14. They constitute a major group of living things, along with the two groups of prokaryotes, the Bacteria and the Archaea.
  11. 15. In nature, some organisms produce clones through asexual reproduction; this reproduction of an organism by itself without a mate is knows as parthenogenesis
  12. 19. organisms whose cells contain a nucleus and other membrane-bound organelles.
  13. 21. the geologically altered remains of a once-living organism and/or its behaviour.
  14. 23. A large organ located in the upper abdomen
  15. 25. organs of the visual system
  16. 26. The molecule inside cells that contains the genetic information responsible for the development and function of an organism