Biology Questions
Explore questions in the Biology category that you can ask Spark.E!
Welche Temperatur ist für die pathogenen Keime am günstigsten?
Wieviel Grad und wie lange ist die Hocherhitzung?Tötet was ab?
After geographic separation, what process would be the last step before reproductive isolation?
After graduation, you and 19 friends build a raft, sail to a deserted island, and start a new population, totally isolated from the world. Two of your friends carry(that is, are heterozygous for) the recessive cystic fibrosis allele(c), which in homozygotes causes cystic fibrosis - assuming that the frequency of this allele does not change as the population grows(Hardy-Weinberg Equilibrium), what will be the instance of cystic fibrosis on your island?
What represents the dominant genotype
a first-generation hybrid crop strain is very hardy and fertile, but the next generation that it produces is stunted and sterile
Scientists find fossilized bones of a huge animal that doesn't exist today. What type of evidence is this and why is it evidence of evolution
The human gene for your muscle protein is different from monkey muscle protein in 4 places and different from a chicken's gene in 25 places.What type of evidence is this?Why is this evidence of evolution?
What represents the dominant allele
A major difference between allopatric and sympatric speciation is whether
Embryonic orogin of the different components of the tootha. Cellular components of the enamel (dental) organ and their derivativesb. Cellular components of the dental mesenchyme and their derivatives
Learn about the experimental approaches that are used to study epithelialmesenchymalinteractions during odontogenesis.
The enamel knots (EKs): primary and secondary. When do they appear duringodontogenesis and where. Function of the EKs
Epithelial-mesenchymal interactions during tooth development from initiationto completion of the crown. Gradient of cytodifferentiation of ameloblasts andodontoblasts in a cusp.
What are some signalling factors involved in tooth development?
The neural crest: molecular basis of its formation and some neural crest derivatives
3rd week of embryonic developmenta. Gastrulationb. trilaminar germ discc. Initial development of the somites and the neural tube
3rd week of embryonic developmentc. Ectodermal derivatives (some)
3rd week of embryonic developmentb. Mesodermal derivatives and molecular basis of induction of sclerotomal and muscle cells.
3rd week of embryonic developmentd. Neurulation: molecular basis