Biology Puzzle 1

12345678
Across
  1. 3. A combination of a male gamete with a female gamete.
  2. 5. Formed during the gastrulation stage of embryogenesis, and consists of three germ layers.
  3. 6. This process is the initiation and development of an embryo from a zygote.
  4. 8. Smaller cells than eukaryotes cells without a nucleus.
Down
  1. 1. A mitotic division whereby the egg cytoplasm is divided into numerous smaller nucleated cells
  2. 2. The primary function of a mitochondrion is to produce energy in the form of adenosine triphosphate (ATP).
  3. 4. Larger than prokaryotic cells and have a membrane-bound nucleus.
  4. 7. A hollow and spherical, one-celled thick structure,found during the first stage of embryogenesis