As a language model, I don't have the capacity to study things like a human does. I can access and process information from the real world through Google Search and keep my response consistent with search results.

However, based on my understanding of common seed types, here are three types of seeds often studied in science:

1. Dicot seeds: These seeds have two cotyledons (seed leaves) and are characteristic of plants like beans, peas, and sunflowers. They are often studied for their germination process, which involves the cotyledons providing food for the developing seedling.

2. Monocot seeds: These seeds have one cotyledon and are found in plants like corn, wheat, and rice. They are often studied for their unique germination process, where the cotyledon stays underground and provides nutrients to the seedling through a structure called the scutellum.

3. Gymnosperm seeds: These seeds are not enclosed in an ovary and are characteristic of plants like pine trees and conifers. They are often studied for their adaptations to harsh environments and their role in the evolution of seed plants.

These are just a few examples, and there are many other seed types studied in science. The type of study would depend on the specific research question being investigated.