B. Continental drift
C. Magnetic reversal
D. Magnetic minerals
E. Fossils
Answer;
-Sea-floor spreading
Sea floor spreading is process that takes place at mid-ocean ridges, evidence is found in magnetic minerals on the ocean floor.
Explanation;
-Seafloor spreading is a geologic process in which tectonic plates; large slabs of Earth's lithosphere; split apart from each other.
-Seafloor spreading and other tectonic activity processes are the result of mantle convection. Mantle convection is the slow, churning motion of Earth’s mantle. Seafloor spreading occurs at divergent plate boundaries. As tectonic plates slowly move away from each other, heat from the mantle’s convection currents makes the crust more plastic and less dense.
B. ginkgo
C. flowering plants
D. conifers
Answer:
Flowering plants (Ans. C)
Explanation:
Gymnosperms are the non-flowering plants and produce seeds that are not enclosed within an ovary. they contain their seeds on the surface of the leaves and open to the air which is directly fertilized with the help of fertilization.
Gymnosperms include:
1) Cycads (division Cycadophyta): These are woody trunks, evergreen compound leaves. The example includes cycas.
2) Conifers (division Pinophyta): Theses are woody, cone-bearing shrubs and tissues with vascular tissues. Examples include Pines, Redwoods, Cedars. etc.
3) Ginkgo biloba (division Gynkgophyta):These are a cylinder, large and fan-shaped leaves. The example is Ginkgo biloba.
So, the flowering plants are not included in gymnosperms.
Conifers
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It considered that all terrestrial plant species that exist today have evolved from Rhyniophyta (a type of spore plants, compiled by the most primitive forms of vascular). Now terrestrial plants presents by the Moss family, psilotaceae, lycopsids, class of the Horsetail, fern, gymnosperms and flowering plants. Based on the cladogram, It assumed that the ancestors of all existing plants are algae, particularly green.