Science

1. the scientific study of the behavior, structure, physiology, classification, and distribution of animals.
4. a diploid cell resulting from the fusion of two haploid gametes; a fertilized ovum.
8. is the gelatinous liquid that fills the inside of a cell.
10. the time at which something is most powerful or successful.
11. plastid that contains chlorophyll and in which photosynthesis takes place.
12. the spreading of something more widely.
13. chemical element of atomic number 30, a silvery-white metal that is a constituent of brass and is used for coating (galvanizing) iron and steel to protect against corrosion.

2. lysosome is a membrane-bound cell organelle that contains digestive enzymes.
3. insoluble substance which is the main constituent of plant cell walls and of vegetable fibers such as cotton. It is a polysaccharide consisting of chains of glucose monomers.
5. any cell or organism that possesses a clearly defined nucleus.
6. Zirconium is a chemical element; it has symbol Zr and atomic number 40.
7. the smallest unit that can live on its own and that makes up all living organisms and the tissues of the body.
9. threadlike structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes.