Search results
Results from the WOW.Com Content Network
The prepupa is a stage in the life cycle of certain insects, following the larva or nymph and preceding the pupa. It occurs in both holometabolous and hemimetabolous insects. Examples
The system requires a transposase enzyme that catalyzes the movement of the DNA from its current location in the genome and inserts it in a new location. Transposition requires three DNA sites on the transposon : two at each end of the transposon called terminal inverted repeats and one at the target site.
The SAT Subject Test in Chemistry was a one-hour multiple choice test given on chemistry by The College Board.A student chose whether to take the test depending upon college entrance requirements for the schools in which the student was planning to apply.
Drosophila embryogenesis, the process by which Drosophila (fruit fly) embryos form, is a favorite model system for genetics and developmental biology. The study of its embryogenesis unlocked the century-long puzzle of how development was controlled, creating the field of evolutionary developmental biology . [ 1 ]
Pupa of the rose chafer beetle, Cetonia aurata Tumbler (pupa) of a mosquito. Unlike most pupae, tumblers can swim around actively. A pupa (from Latin pupa 'doll'; pl.: pupae) is the life stage of some insects undergoing transformation between immature and mature stages.
Cinnamaldehyde is a naturally-occurring compound that has a conjugated system penta-1,3-diene is a molecule with a conjugated system Diazomethane conjugated pi-system. In theoretical chemistry, a conjugated system is a system of connected p-orbitals with delocalized electrons in a molecule, which in general lowers the overall energy of the molecule and increases stability.
A buffer solution is a solution where the pH does not change significantly on dilution or if an acid or base is added at constant temperature. [1] Its pH changes very little when a small amount of strong acid or base is added to it.
To be more specific, the name may need to represent the three-dimensional arrangement of the atoms. This requires adding more rules to the standard IUPAC system (the Chemical Abstracts Service system (CAS system) is the one used most commonly in this context), at the expense of having names which are longer and less familiar.