What are adenomas and hyperplastic polyps? Both adenomas and hyperplastic polyps are two types of polyps (abnormal tissue growth on a mucous membrane like colon or endometrium). Adenomatous polyps have the potential to become malignant (cancerous). However, hyperplastic polyps have least probability of becoming malignant (cancerous) Similarity Both adenomas and hyperplastic polyps are types of polyps  Adenomas  Adenomatous polyps are the most common type of polyps. These appear gland like extensions that grow or develop on the mucous membrane (he moist, inner lining of some organs and body cavities) that lines the large intestine (colon).

The main difference between antheridium and archegonium is that antheridium is the haploid structure producing male gametes in cryptogams such as ferns and bryophytes, whereas archegonium is the multicellular structure producing female gametes in both cryptogams and gymnosperms.Furthermore, antheridium is a club-shaped structure born on a short, multicellular stalk while archegonium has a neck, venter, and a swollen base. In addition to these, androecium resembles the antheridium in flowering plants while gynoecium resembles the archegonium.