any of the branches of natural science dealing with the structure and behavior of living organisms

dealing with the geographical distribution of animals and plants

the branch of biology that studies plants

the branch of biology that studies the effects of low temperatures on living tissues or organs or organisms

the branch of biology that studies the structure and function of cells

the branch of biology concerned with the relations between organisms and their environment

facing away from the axis of an organ or organism

nearest to or facing toward the axis of an organ or organism

bent or curved forward or upward

bent or curved backward or downward

partially aquatic; living or growing partly on land and partly in water