Plants that produce seeds within a cone are called

Plants that produce seeds within a cone are called gymnosperms. This is a type of plants that includes conifers, cycads, Ginkgo, and gnetophytes. Angiosperms have flowers, which is something gymnosperms do not. Microsporangia are just places where spores are created. So the correct answer has to be gymnosperms.

4, two dominant and two recessive

Gay-lussac's law i think.