1 The study included the most common STDs: HPV, chlamydia, herpes simplex virus, and trichomoniasis. 2  There are approximately 15 million new cases of sexually transmitted infection each year in the United States, and 340 million worldwide.  The majority of STI's are asymptomatic (no symptoms).
Monocots have a trimerous flower, or a flower with parts in multiples of three. You can simply count the petals of a flower, and if you can divide the total number by three, you probably have a monocot. As you can see in this image of a lily, there are six petals in total, a multiple of three. Lilies are a type of monocot. In fact, many big, showy flowers like lilies, daffodils, bluebells, irises, orchids, and tulips are monocots. But flowers aren't the only way to recognize a monocot.
Some examples of monocot seeds are maize, rice, wheat, coconut, grasses, etc. Dicot seeds contain two cotyledon, which are thick and fleshy. The cotyledon is responsible for the absorption of nutrients from the endosperm before the germination of the seed. Some common examples of dicot seeds are pea, bean, peanut, apple, etc. Each dicot seed has a unique seed coat, which provides a distinctive appearance. Testa is the outer layer of seed coat, which protects the seed from damage and prevents it from drying out. Tegmen is the thin layer lying next to testa.