histidine has three ionizable functional groups. complete the equilibrium equations by assigning the proper pKa for each ionization and the net charge on the histidine molecule in each ionization state.

An ecosystem is shown in the illustration. assume that human activities have led to a decrease in the number of eagles. a virus attack on rabbits has led to a decrease in their population in the ecosystem. which two sentences describe likely effects on the ecosystem? 1. there’s an increase in the number of snakes and insects and a decrease in the number of frogs. 2. there’s an increase in the number of snakes and insects, and the storks face increased competition for food. 3. there’s an increase in the number of storks and a decrease in the number of snakes and insects. 4. there’s an increase in the number of frogs and a decrease in the number of storks and insects. 5. there’s a decrease in the number of snakes, insects, and frogs.

True or false jupiter’s large size causes it to complete rotations more slowly than the other planets.

of the following words means "to make something unnecessary"? who talke constantlyor in na