At cyst formation in the 'giant' unicellular green alga Acetabularia, each cyst contains a single nucleus which subsequently undergoes several rounds of mitosis prior to gamete formation. Initially t...

At cyst formation in the 'giant' unicellular green alga Acetabularia, each cyst contains a single nucleus which subsequently undergoes several rounds of mitosis prior to gamete formation. Initially t...

At cyst formation in the 'giant' unicellular green alga Acetabularia, each cyst contains a single nucleus which subsequently undergoes several rounds of mitosis prior to gamete formation. Initially t...

In the contact area between two conjugating cells the tips of the ridges all fuse forming openings between the two cells. TEM taken on 3/4/80 by R. Allen with Hitachi HU11A operating at 75kV. Neg. 8,5...

Figure 302 from Chapter 12 (Centrioles) by Don Fawcett. The centrioles replicate early in cell division and take up positions at either pole of the division figure. Concurrently with the condensation ...

In an enlargement of a pronucleus in the chromatin material appears as sparsely scattered opaque bodies, as may be expected of a haploid nucleus, in a medium dense nucleoplasm. The nuclear envelope of...

Time lapse movie of the prophase stage during meiosis I in spermatocytes of the Locust Psophus stridulus. This is a historic movie made in the early 40s by Kurt Michel of the Zeiss company in Jena u...

High resolution image of mucocysts which have a herringbone pattern of subunits and are surrounded by a membrane that fuses with the plasma membrane. When the mucocyst content is extruded the content ...

Cross section through a seminiferous tubule showing the developing sperm with their tails pointing into the lumen of the tubule. The nuclei are stained blue with DAPI and mitochondria red with mitotra...

Time lapse movie of meiosis in spermatocytes of the Locust Psophus stridulus showing telophase of meiosis I, cytokinesis, interphase, and prophase of meiosis II. This is a historic movie made in the...