#Question id: 5647
#Unit 5. Developmental Biology
Use the following information to answer the question. In order to test how sea urchin sperm bind to eggs, scientists isolated the egg receptor protein
that binds to the sperm acrosomal protein called bindin. Plastic beads were coated with egg receptor for bindin (ERB1) from eggs of the sea urchin Strongylocentrotus purpuratus, and then the beads mixed with sperm from S. purpuratus or from the related species, S. franciscanus. The researchers counted how many sperm were bound to each bead. The results are shown in the graph below. Treatments:
A: S. purpuratus sperm mixed with S. purpuratus ERB1 beads
B: S. purpuratus sperm mixed with beads containing no ERB1 protein
C: S. franciscanus sperm mixed with S. purpuratus ERB1 beads
D: S. franciscanus sperm mixed with beads containing no ERB1 protein
Based on the data in the graph, which of the following conclusions is supported?
#Question id: 12490
#Unit 8. Inheritance Biology
#Question id: 10306
#Unit 1. Molecules and their Interaction Relevant to Biology
pyruvate dehydrogenase (PDH) complex requires five different coenzymes or prosthetic groups and these enzymesalso require four different vitamins in human nutrition are vital components of this system:
#Question id: 12835
#Unit 2. Cellular Organization
#Question id: 3483
#Unit 11. Evolution and Behavior
Which of the following statements about evolution of behavior is correct?
A) Natural selection will favor behavior that enhances survival and reproduction.
B) An animal may show behavior that maximizes reproductive fitness.
C) If a behavior is less than optimal, it is not completely evolved but will eventually,become optimal.