Read the passage below. Prior to the 1970s, scientists thought that new neurons could not be generated in adult brains. In the 1970s, Dr. Goldman and Dr. Nottbohm discovered that hormones injected in adult songbirds could cause female songbirds to develop new neurons. Which statement best exemplifies the scientific principle that was involved in this case? New experiments do not affect science because science remains constant. New experiments can affect future scientific explanations. New experiments can affect previous scientific explanations. New experiments yield untrustworthy data and should be carefully considered.

Witch type of microscope is used to view very small cell components like proteins and dna?

Explain why the plants cortex would serve as the best food source for animals

Use this dichotomous key for insect identification to identify the insect shown. 1. a. insect has one pair of wings. order diptera b. insect has two pairs of wings. go to #2 2. a. front wings thicker in texture than hind wings go to #3. b. front and hind wings are same texture throughout. go to #4 3. a. front wings are short order dermaptera b. front wings cover entire abdomen order coleoptera 4. a. wings with scale on all parts of their area. order lepidoptera b. wings without scales go to #5. 5. a. hind wings smaller than front wings. order ephemeroptera b. front and hind wings nearly equal in size. order odonata the insect pictured is in the order diptera. ephemeroptera. coleoptera. odonata.