Answer:send the question again
Explanation:
Gene flow is the movement of genes into and out of a gene pool.
Essay: Explain how water erosion by groundwater can form a cave. Water sinks into the ground and mixes with carbon dioxide to form carbonic acid. Carbon acid can break down limestone. Some of the limestone gets carried away.
Both gymnosperms and angiosperms have vascular tissue that is specialized for transport of minerals, water, and organic compounds. Also, both gymnosperms and angiosperms have seeds. The only difference is that angiosperms have seeds hidden in the ovary while gymnosperms have seed on the surface of the scales of the cones.
This is a diagram of a paramecium.
