Horizontal axis on a graph.
One of the sex chromosomes.
Tissue or organs from an individual of one species transplanted into or grafted onto an organism of another species, genus, or family. A common example is the use of pig heart valves in humans.
A piece of country rock found engulfed in an intrusion.
Plant that have adaptations to survive prolonged periods of soil drought.
The leaves of plants that grow under arid conditions with low levels of soil and water. Usually characterized by water-conserving features such as thick cuticle and sunken stomatal pits.
Conducting tissue in vascular plants through which water and mineral nutrients are transported.