one of the groups of mammals that includes the kangaroo, koala, bandicoot, Tasmanian devil, and several other species; young develop within a pouch

event or environmental condition that wipes out the majority of species within a relatively short geological time period

total number of protons and neutrons in an atom

leukocyte that produces inflammatory molecules, such as histamine, in response to large pathogens and allergens

jawed pharynx unique to the rotifers

section of a scientific paper that includes a complete description of the substances, methods, and techniques that the researchers used to gather data

signaling molecule secreted by yeast cells to communicate to nearby yeast cells that they are available to mate

component of connective tissue made of both living and nonliving (ground substances) cells

envelope protein that stabilizes the envelope and often plays a role in the assembly of progeny virions

anything that has mass and occupies space

applying the simplest, most obvious way with the least number of steps

sensory receptor modified to respond to mechanical disturbance such as being bent, touch, pressure, motion, and sound

rotation toward the midline of the body

free-floating cnidarian body plan with mouth on underside and tentacles hanging down from a bell

large animals