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round or spherical-shaped bacteria.
the transfer of pollen from the anther to the stigma of the same plant (self-pollination) or of...
minute pores in the epidermis of a leaf or stem which allows for movement of gases and water...
the deposition or build-up of silt and organic matter on the beds of rivers, dams etc.
the movement of an organism in response to a one-directional source of light when the stimulus...
a gland which secretes substances, usually enzymes, through a duct directly to the part of the...