- Life Sciences
the kingdom of multicellular organisms that contain chlorophyll and make their own food by photosynthesis. Plants have cell walls that are made of cellulose and hemi-cellulose. They reproduce asexually and sexually.
a physical and psychological dependence on alcohol, which affects every aspect of a person's...
the factor in an investigation that is under the control of the investigator.
a method of ordering the age of different fossils, relative to each other, without working out...