The hooked tips of burdock seeds catch onto the hair of passing cows. the seeds are dispersed in this way to other places by the cow. the cow is unaffected by this process. what is the name of the relationship that exists between the burdock and the cow?

Suppose the price of frozen yogurt, a substitute for ice cream, increases. what happens to equilibrium price and quantity of ice cream? a. the price and quantity of ice cream both increase b. the price and quantity of ice cream both decrease c. the price of ice cream increases and the quantity decreases d. the price of ice cream decreases and the quantity increases

The prebisch–singer hypothesis concludes that: a. technology lowers the cost of manufactured products, so developing countries should see an increase in their terms of trade. b. developing countries experience a long-run decline in their terms of trade, as the demand for primary products in higher-income countries declines relative to their demand for manufactured goods. c. because of unfair trading practices, labor in developing countries is exploited. d. opec has been responsible for a slowdown in the world's standard of living.

Suppose you hold a portfolio consisting of a $10,000 investment in each of 8 different common stocks. the portfolio's beta is 1.25. now suppose you decided to sell one of your stocks that has a beta of 1.00 and to use the proceeds to buy a replacement stock with a beta of 1.55. what would the portfolio's new beta be? do not round your intermediate calculations.