Atlantic salmon migrate to rivers in New England to reproduce and to the coast of Greenland to feed. Which of these scenarios could cause a decrease in salmon populations due to competition?

What is the definition of symbiosis?

What happens to predator populations when their prey are limited?

Which statement best describes the interaction between frogs and insects?

The image above shows a predator-prey relationship over time. An example of a predator prey relationship is the lynx cat and the snow hare. Which of the following statements are true?

A tapeworm needs to eat food that is already digested, so it lives in the intestines of a dogfish shark and derives nourishment from the shark. As a result of the tapeworm infestation, the shark is weakened and more vulnerable to disease and predation.

What is it called when one organism benefits from a relationship while the other is harmed?

A pearlfish spends the day inside the alimentary tract, or intestines, of a sea cucumber. The fish emerges from the sea cucumber at night to feed on small crustaceans. The pearlfish gets a safe place to live. The sea cucumber does not gain anything from the relationship, nor is it harmed. This is an example of which type of symbiotic relationship?

The clownfish and the sea anemone are a famous example of a symbiotic relationship. The sea anemone offers the clownfish protection and leftover food while the sea anemones are given better water circulation because the clownfish fan their fins while swimming about. This is an example of which type of symbiotic relationship?

Corals feed off the byproducts of a microscopic algae living within their own tissue, called zooxanthellae. The photosynthetic activity of the algae is vital to the survival of the coral animals, which use the energy to extract calcium from the seawater and build their calcareous skeletons. The zooxanthellae are protected by the hard coral and obtain plant nutrients from the coral. This is an example of: