#Question id: 3455
#Unit 11. Evolution and Behavior
A duck egg is removed from its mother’s nest and incubated by a barnyard hen. The duckling hatches out in the presence of the barnyard hen and stays in her nest. After a couple of days, the duckling is presented with a choice between its biological mother and the hen that incubated it. The duckling approaches and follows the hen. This set of observations demonstrates the phenomenon of
#Question id: 5081
#Unit 5. Developmental Biology
The vegetal pole of a frog zygote differs from the animal pole in that ________.
#Question id: 12744
#Unit 13. Methods in Biology
#Question id: 719
#Unit 1. Molecules and their Interaction Relevant to Biology
Suppose that a 40-residue segment of a protein folds into a two-stranded antiparallel β structure with a 4-residue hairpin turn. What is the longest dimension of this motif?
#Question id: 28255
#Unit 5. Developmental Biology
Which of the following structure of egg homologous to the acrosomal vesicle of the sperm?