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2. Germ layer - Wikipedia

   en.wikipedia.org/wiki/Germ_layer

   In all vertebrates, these progenitor cells differentiate into all adult tissues and organs. [5] In the human embryo, after about three days, the zygote forms a solid mass of cells by mitotic division, called a morula. This then changes to a blastocyst, consisting of an outer layer called a trophoblast, and an inner cell mass called the embryoblast.

3. Quizlet - Wikipedia

   en.wikipedia.org/wiki/Quizlet

   Quizlet was founded in October 2005 by Andrew Sutherland, who at the time was a 15-year old student, [2] and released to the public in January 2007. [3] Quizlet's primary products include digital flash cards , matching games , practice electronic assessments , and live quizzes.

4. Cellular compartment - Wikipedia

   en.wikipedia.org/wiki/Cellular_compartment

   Cellular compartments in cell biology comprise all of the closed parts within the cytosol of a eukaryotic cell, usually surrounded by a single or double lipid layer membrane. These compartments are often, but not always, defined as membrane-bound organelles. The formation of cellular compartments is called compartmentalization.

5. Cellular senescence - Wikipedia

   en.wikipedia.org/wiki/Cellular_senescence

   Immune system cells can be recruited by SASP to senescent cells, after which the SASP from the senescent cells can induce the immune system cells to become senescent. [ 64 ] Chimeric antigen receptor T cells have been proposed as an alternative means to senolytic drugs for the elimination of senescent cells. [ 64 ]

6. Quiz bowl - Wikipedia

   en.wikipedia.org/wiki/Quiz_bowl

   [3] [17] In most formats, a game ends once the moderator has finished reading every question in a packet, usually 20. [3] Tie-breaking procedures may include reading extra toss-ups until the tie is broken or sudden-death toss-ups. [3] [17] Quiz bowl tests players in a variety of academic subjects including literature, science, history, and fine ...

7. Atmospheric circulation - Wikipedia

   en.wikipedia.org/wiki/Atmospheric_circulation

   The Pacific Ocean cell plays a particularly important role in Earth's weather. This entirely ocean-based cell comes about as the result of a marked difference in the surface temperatures of the western and eastern Pacific. Under ordinary circumstances, the western Pacific waters are warm, and the eastern waters are cool.

8. Free Online Games: Play board games, card games, casino ... - AOL

   www.aol.com/games

   Discover the best free online games at AOL.com - Play board, card, casino, puzzle and many more online games while chatting with others in real-time.

9. Artificial cell - Wikipedia

   en.wikipedia.org/wiki/Artificial_cell

   Artificial cells used for drug delivery differ from other artificial cells since their contents are intended to diffuse out of the membrane, or be engulfed and digested by a host target cell. Often used are submicron, lipid membrane artificial cells that may be referred to as nanocapsules, nanoparticles, polymersomes, or other variations of the ...