What science term starts with the letter A?

Amino Acid

Bacteria

Cells

Diatoms

Embryo

Folic Acid

Genome

Hemoglobin

Iris

Joints

Keratin

Lipids

Molecule

Nucleus

Ovum

Photosynthesis

Quadrant

Rhinovirus

Sperm

Taproot

Ulna

Virus

Waterborne

Xanthan

Yeast

Zygote