blastula

Blastulae were present from 9-14 h postfertilization, and gastrulae measuring 114.20 [+ or -] 1.06 [micro]m were first seen 9 h postfertilization through to 22 h postfertilization.

Spherical blastulae, rather than the "blastosquare" described for Micrura alaskensis (Maslakova, 2010a), form by 17 h PF (Fig.

(1995) Expression cloning of Siamois, Xenopus homeobox gene expressed in dorsal-vegetal cells of blastulae and able to induce a complete secondary axis.

When blastulae were seen swimming at the surface of water, they were transferred to glass bottles, containing 400 mL of sterilized filtered seawater (SFSW), which was stirred constantly on a set of 10 rpm rotating rollers.

The dipsomaniacs that returned late into the night from their pubs and made their customary urinovomitive halt in the sheltering murk of Sergeant Levarda sometimes found themselves with their noses against the window beyond which kaleidoscopic shapes were twisting and spinning and wobbling, rhodochrosite crystals that liqueified into throbbing exotic flowers sprouting lanceolate protuberances, quills that multiplied like a porcupine's, swords that blunted into milestones, into Gaelic cairns, then they rounded into seeds, swelled into colored drupes, into ink-blue blastulae, then into indigo morulae, so that in the end it all coalesced into one single large zygote of fluorescent plasma, hovering in the dark as if in a black hole.

Far from being as simple as the discussion of whether or not zygotes or blastulae are "persons" or have souls, the ethical issues regarding stem-cell research comprise a significantly more complicated milieu that includes the very foundation of scientific enquiry.

Fat was also extracted from blastulae and neonates, and lean dry mass was measured.

All other echinoids with nonfeeding larvae also form wrinkled blastulae (Raff 1987); blastulae in most species with obligate-feeding larvae are smooth.

Ciliated, swimming blastulae with a small blastocoel were formed about 16 h after fertilization (Fig.

At the highest temperature of 19.2[degrees]C, the fertilized eggs rapidly reached the 2- and 4-cell stages at 10 and 44 min ACTT, respectively, became motile blastulae at 10 h ACTT, and developed further into early gastrulae (Fig.

Development was monitored through examination of random samples of 20 specimens collected from each culture, and the number of blastulae, gastrulae, and brachiolariae was assessed.

Though absent in some other cidaroid embyros, an apical tuft (83-gm long on a 165-[micro]m-long embryo) first became evident in recently hatched blastulae and persisted through the early two-arm pluteus stage (Figs.