blastosphere
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The earliest one-celled protozoa were probably succeeded by many- celled animals of the type of the blastosphere, and these by gastrula-like organisms.
From The Elements of Geology by William Harmon Norton
Plainly, the blastosphere cannot be pre-existing as a structure of particles in the fertilised nucleus; there cannot be blastosphere determinants.
From The Biological Problem of To-day Preformation Or Epigenesis? The Basis of a Theory of Organic Development by Oscar Hertwig
We naturally assume, from what we have learnt, that the next stages will be the formation of a hollow blastosphere, invagination, a gastrula forming mesoblast by hollow outgrowths from the archenteron, and so on.
From Text Book of Biology, Part 1: Vertebrata by H. G. (Herbert George) Wells
If we compare this with the typical blastosphere of the lower type, we see that it is, as it were, flattened out on the yolk.
From Text Book of Biology, Part 1: Vertebrata by H. G. (Herbert George) Wells
Both the blastosphere and gastrula often swim freely by flagella.
From The Whence and the Whither of Man A Brief History of His Origin and Development through Conformity to Environment; Being the Morse Lectures of 1895 by John Mason Tyler
