Download or read book A Mysterious Presence written by Percy Knauth and published by Workman Publishing. This book was released on 1979 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: About the photographer; The food chain; Avocados; Fertilization & pollination; Beets & radishes; The seed; Cucumbers; Germination; Cabbages; How cells divide; Peas; Where cells divide; Potatoes; The mechanics of growth; Tomatoes; Phototropism; African violets; Cell differentiation; Onions; Forming leaves; Squash; Photosynthesis; Cornflowers; Water; Beans; Photoperiodism; Peppers; Color; Cantaloupe; Tubers; Peanuts; About percy knauth.