#Question id: 18392
#SCPH01 Biochemistry
#Question id: 17279
#SCPH01 Biochemistry
#Question id: 7021
#SCPH01 Biochemistry
The tracheal (respiratory) system in Drosophila embryos develops from epithelial sacs. The approximately 80 cells in each of these sacs become reorganized into primary, secondary, and tertiary branches without any cell division or cell death. This reorganization is initiated when nearby cells secrete a protein called Branchless, which acts as a:
#Question id: 10783
#SCPH05 I Biotechnology
which of the following compounds are more diversified in terms of soluibility such as : Some are soluble only in organic solvents, some are water-soluble carboxylic acids and glycosides, and others are large, insoluble polymers;
#Question id: 5016
#SCPH06 I Botany
Approximately how far back in time does the fossil record extend?