A group of organs that work together to perform a common function is an organ system
In most cases, the two major climatic factors affecting the distribution of organisms in terrestrial ecosystems are the amount of water and temperatures. Terrestrial ecosystems rely on the sun's energy to support the growth and metabolism of the organisms. Plants use the sunlight, then they supply the organisms that are higher up the food chain with energy and the structural buildings blocks of life. Water is also essential for the survival of these organisms.
Water and ATP energy
where carbon dioxide is a waste product and is released into the atmosphere.
The parents both need to be heterozygous, meaning they have to have one dominant and one recessive allele.
Very powerful microscopes were needed before cells could be observed in detail
