Ava had a pet goldfish, and she loved feeding it and watching it swim around in its bowl. After four months, she noticed that her fish hadn't grown much, so she looked up information about caring for goldfish. She learned that unless she made changes, her goldfish would remain small. Look at the picture, and choose the correct words to finish the sentences.

The image shows an example of a(n) _ affecting her fish's growth. Other conditions that could affect animal growth include _.

Word Bank: life cycle | internal environmental factor | genes | hormones | external environmental factor | metamorphosis​

the supermassive black hole is in the middle of the galaxy.

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms

the law of original horizontality explains:   why rocks appear in layers. correct answer: b the law suggests that all rock layers are originally laid down (deposited) horizontally and can later be deformed.   the principle is used by geologists to make assumptions about the relative ages of sedimentary rocks.