Rattlesnake fern, or botrychium virginianum, as shown below, is a species of fern, a seedless plant, that is found all across north america. which structure is involved in the reproduction of this plant? spores pollen cones fruit(i think its spores but i'm not sure)

Which best describes the nucleus of an atom a. it is where all of the particle s of the atom are located b. it is the negatively charged part of the atom c. it is where the electrons and the protons are located d. it is the part of the atom with the greatest mass

Nucleic acids offer variability because they contain alternate forms of genes called .

Hairs that clean dirt out of the air in your nasal passages are called: a. sinus b. trachea c. cilia d. mucus