species suited to changing environments that produce many offspring and provide little or no parental care

cleavage axes are parallel or perpendicular to the polar axis, resulting in the alignment of cells between the two poles

glia that serve as scaffolds for developing neurons as they migrate to their final destinations

type of symmetry with multiple planes of symmetry, with body parts (rays) arranged around a central disk

information obtained by fragmenting the chromosome with x-rays

original root that develops from the germinating seed

isotope that emits radiation comprised of subatomic particles to form more stable elements

organism that grows in high levels of radiation

bone located along the lateral (thumb) side of the forearm; articulates with the humerus at the elbow

tongue-like organ with chitinous ornamentation

slit in the silica shell of diatoms through which the protist secretes a stream of mucopolysaccharides for locomotion and attachment to substrates

complex of chlorophyll molecules and other organic molecules that is assembled around a special pair of chlorophyll molecules and a primary electron acceptor; capable of undergoing oxidation and reduction

sequence of triplet codons in mRNA that specify a particular protein; a ribosome shift of one or two nucleotides in either direction completely abolishes synthesis of that protein

receipt of a signal (such as light or sound) by sensory receptors

region in space in which a stimulus can activate a given sensory receptor