Your teacher likes to copy. Found this at https://examples.yourdictionary.com/examples-of-keystone-species.html
Grizzly bears: As predators, bears keep down the numbers of several species, like moose and elk. They also carry and deposit seeds throughout the ecosystem. Bears that eat salmon will leave their dropping and the partially eaten remains that provide nutrients such as sulfur, nitrogen and carbon to the soil.
When writing a hypothesis, you need to be able to say IF this, THEN this will happen.
No; some mice may have developed lung cancer in less than 500 days of cigarette smoke exposure.
Bat wings are made of a rubbery substance while eagles wings are covered in feathers
Answer:
phototropism only happens after plants move from darkness into the light (false)
