At equilibrium, the free energy of a reaction is which of the following?
A.) at its lowest point
B.) energetically unfavorable
C.) at its highest point
D.) energetically favorable
E.) equal to delta Gc
Ans: A.) at its lowest point
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Who conducted the famous "imprinting" experiment on geese?
A. Mendel B. Russel C. Lorenz D. Darwin E. Raven
In a certain plant species, thick-shelled seeds are caused by the dominant allele T. Thin-shelled seeds are caused by the recessive allele t. What is the genotype of an individual with thin-shelled seeds?
A) TT B) tt C) Tt D) tt or Tt
The appearance of Pax-6 in all animals with eyes can be explained in multiple ways. Based on the information above, which explanation is most likely?
A) Pax-6 in all of these animals is not homologous; it arose independently in many different animal phyla due to intense selective pressure favoring vision. B) The Pax-6 gene is really not one gene. It is many different genes that, over evolutionary time and due to convergence, have come to have a similar nucleotide sequence and function. C) The Pax-6 gene was an innovation of an ancestral animal of the early Cambrian period. Animals with eyes or eyespots are descendants of this ancestor. D) The need for eyes has resulted in the separate evolution of Pax-6 genes.
How do mutations contribute to evolution?
What will be an ideal response?