A lichen is a simple plant consisting of a fungus, usually of the subdivision Ascomycotina, that grows symbiotically with algae. It usually forms a low crust-like or branching growth on rocks, walls, or trees. This is a picture of lichen growing on a tree near my house.
K-strategists are organisms that produce small numbers of offspring at a time and protect their young. Dogs, like my friend's dog who's pictured, are K-strategists.
The Krebs Cycle is the complex series of chemical reactions in all cells that utilize oxygen as a part of their respiration process.This plant goes through the Krebs cycle in its mitochondria.
Introduced species are species that humans have placed into an ecosystem or community, accidentally or intentionally, in which it doesn't naturally occur. This is a picture of a Chinese elm tree in my yard which is not native to America, but was brought here by humans.
A heterotroph is an organism that derives its nutritional requirements from complex organic substances. All animals, such as my friend's dog who's pictured, are heterotrophs.
Hydrophobic means to not have a tendency to mix with, dissolve in, or be wetted by water. Oil is hydrophobic; to demonstrate this, I mixed some oil from my kitchen with water in a glass.
Hydrophilic means to have a tendency to mix with, dissolve in, or be wetted by water. Salt is hydrophilic; to demonstrate this, I mixed some salt from my kitchen with water in a glass.
