Instead, it stated that the decision to get routine screening mammograms before age 50 should be an individual one and take patient context into account, including the patient's values regarding specific benefits and harms..
The seed coat helps protect the embryo from mechanical injury, predators and drying out. Depending on its development, the seed coat is either bitegmic or unitegmic. Bitegmic seeds form a testa from the outer integument and a tegmen from the inner integument while unitegmic seeds have only one integument.
A seed cannot sprout until water and oxygen. penetrate the seed coat. When water enters a seed, the tissues in the. seed swell, and the seed coat breaks. If enough water and oxygen are. available after the seed coat breaks, the young plant, or seedling, begins to grow. Germination. A plant embryo resumes its growth in a process called .