In the intestine, 1,25-dihydroxycholecalciferol induces the synthesis of 

#Question id: 11442

#Unit 10. Ecological Principles

Forests dominated primarily by evergreen trees with abundant lianas and epiphytes are found in which of the following biomes?

#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: 907

#Unit 1. Molecules and their Interaction Relevant to Biology

Thermodynamics of protein folding is depicted as a free energy vs folding process:

Choose the correct match for regions mentioned in the figure

#Question id: 12588

#Unit 10. Ecological Principles

#Question id: 9160

#Unit 9. Diversity of Life Forms

Generally speaking, deserts are located in places where air masses are usually ________.