An organism is found during a biopsy of lung tissue. It is determined to belong to the genus Streptococcus and is known to cause tuberculosis. What type of organism is this? Bacteria A botanist has discovered a new plant and notes that it is predominantly found in its gametophyte form. Which category does this plant most likely belong to? Bryophyte In the fetal circulatory system, the ductus venosus allows blood to bypass? Liver What would be the expected outcome if the acrosome of a mature sperm failed to develop? Inability to penetrate zona pellucida IgA Found in muccous, salivia, tears, and breast milk. Protects against pathogens IgD Part of the B cell receptor. Activates basophils and mast cells IgE Protects against parasitic worms. Responsible for allergic reaction