Provide a detailed drawing or image

Q1. In a cross between a purple flowered plant and a white flowered plant, all 73 of the offspring had purple flowers. What are the most probable genotypes of the parent plants?
Q2. Theoretically molecular clocks are to molecular phylogenetics as radiometric dating is to phylogenetics that is based on?
Q3. Select a single invertebrate and describe how is carries out its homeostasis with respect to water and salt balance. Provide a detailed drawing or image (reference source) to show the answer.