Examlex
In the process of ________ two substances are moved across a cell membrane in the same direction without directly using cellular energy.One of the substances can be moved against a concentration gradient by this process.
Blastocyst
An early stage of embryonic development in mammals, characterized by a sphere of cells surrounding a fluid-filled cavity and the inner cell mass that will develop into the embryo.
Blastula
An early stage in embryonic development in animals, characterized by a sphere of cells (blastomeres) surrounding a fluid-filled cavity (blastocoel).
Embryonic Development
The process by which an embryo forms and develops, from the fertilization of the ovum to the fetal stage of development.
Blastocoel
is the fluid-filled cavity inside the blastula, an early stage in embryonic development.
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