A student went to study a local pond. In one part of the pond she noticed tadpoles scraping at some pond weed. In another part, she saw a water beetle holding a tadpole in its jaws. A student went to study a local pond. In one part of the pond she noticed tadpoles scraping at some pond weed. In another part, she saw a water beetle holding a tadpole in its jaws.<b>(a)</b> Construct a food chain for the pond.<b>(b) </b>How many links are there in this chain?