Cedar-apple rust fungus - Carrot like shapes emerging from a small cone on this cedar tree. The fungus overwinters inside, then the orange jellylike "horns" grow out in the spring and produce spores in the apple.
Hospital-associated Methicillin-resistant Staphylococcus aureus (MRSA) Bacteria. Interaction of MRSA (green bacteria) w/ a human white cell. The bacteria shown is strain MRSA252, a leading cause of hospital-assoc. infections in the US and UK
Human embryo at day four | Image Editor Scanning electron micrograph of a human embryo at day 4. The protein coat surrounding the egg (zona pellucida, gold) has been slit to expose the embryonic cells inside (red). These cells go on to form the embryo and can be harvested and cultured to give rise to embryonic stem (ES) cells. Microvilli are visible on the surface of the embryonic cells (blastomeres) and numerous sperm (blue) are still visible on the outside of the zona pellucida.