#Question id: 7116
#Unit 5. Developmental Biology
Which one statement best describes gastrulation in sea
urchins?
a) Gastrulation is initiated by invagination of the
micromeres at the vegetal pole.
b) The mouth of the pluteus larva will form from
mesomeres on the oral side of the 60-cell embryo.
c) The gut will form from the macromeres at the
16-cell stage.
d) Mesenchymal cells originating at the vegetal pole
will invaginate first during gastrulation and will form skeletal structures in
the pluteus larva.
Which of the following combination is correct?
#Question id: 3478
#Unit 11. Evolution and Behavior
Natural selection may favour the evolution of foraging behaviours by predator that
#Question id: 5569
#Unit 5. Developmental Biology
What makes sexually reproduced offspring genetically different from their parents?
#Question id: 3910
#Unit 3. Fundamental Processes
RNA polymerase uses the __ strand of DNA in transcription.
#Question id: 4192
#Unit 3. Fundamental Processes
At the end of the initiation step, the ribosome has a vacant