Answer Happy

Which of the descriptions are examples of coevolution? Saguaro cacti store large volumes of water after rare desert rainstorms. Fig wasps exclusively lay eggs in and pollinate the flowers of fig trees. Crabs have strong claws to crack the thick defensive shells of mollusks they eat. Male deer grow antlers yearly to compete with other males for females.
Which of the mutualistic relationships are not symbiotic? A termite's gut is home to protozoa that break down cellulose in the wood the termite ingests. A bee pollinates a flowering plant while feeding on its nectar. Nitrogen-fixing bacteria live in a plant's roots and provide the plant with ammonia. A small fish eats dead skin and parasites on a larger fish. A fungus provides a habitat for an alga while the alga produces food for both.