Mitochondria and chloroplast are structures found in the eukaryotic cells. What is the theory regarding their origins?

Which of the following lines of evidence would best support your assertion that a particular plant is an angiosperm? a) it produces seeds. b) it retains its fertilized egg within its archaegonium. c) it lacks gametangia. d) it undergoes alternation of generations.

How does natural selection change thephenotypes within a population over time?

Where is most of the fresh water on earth found a in the ocean b in glaciers and in ice caps c in rivers d in the soil