The cytoplasm of the lower epidermal cells of the plant species zebrina contains purple pigment. what is the advantage of using the purple colored epidermis of zebrina

1. describe the structure and function of the specialized cells you observed in the video. 2. research the types of cells present in the kidney.

In a lab, scientists grew several generations of offspring of a plant using the method shown. what conclusion can you make about the offspring? a. they formed from meiosis and mitosis. b. they have half the number of chromosomes as their parent. c. they have low genetic variability among them. d. they will be able to reproduce only after they grow flowers.

1. in what ways have non-native species been beneficial? 2. what are some of the hypotheses for the collapse of honeybee colonies? 3. distinguish between regional and functional extinction. 4. why is it difficult to measure background extinction rates? 5. what three factors are most important in causing extinction rates to climb?