Identifying Unknown Organisms

Which is a correct observation based on the photo shown below?

Amaya collected insects in the forest. She was unable to identify one unusual looking insect using a dichotomous key. Amaya concluded that the insect must be a new species. Which facts would support the conclusion that the insect is a new species?

Use this chart of a portion of a dichotomous key to answer the question. Dichotomous Key mc011-1.jpg Which question distinguishes organism X from organism Z?

A botanist observes a large population of a particular type of beetle eating the leaves of one tree but not the leaves of a nearby tree. What should the botanist do first to study the interaction of these organisms in the ecosystem?

Observations of organisms include

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. Insect has an extremely long neck. Go to #3. b. Insect has a regular length or no neck. Go to #4. 3. a. Forelegs come together in a "praying" position. order Mantodea b. Forelegs do not come together in a "praying" position. order Raphidoptera 4. a. Wings in front are armor-like over hind wings. order Coleoptera b. Wings are not armor-like. Go to #5. 5. a. Wings twist when the insect is in flight. order Strepsiptera b. Wings flap up and down (no twisting) when the insect is in flight. Go to #6. mc017-1.jpg The insect pictured is in the order

Dichotomous keys ask

Refer to this portion of a dichotomous key for fish identification to answer the question. 1. (a) Has a single dorsal fin ® 5 (b) Has a double dorsal fin ® 2 5. (a) Has small fin on back near tail ® 6 (b) Has no fin on back near tail ® 7 6. (a) Has barbs near the mouth ® Catfish (b) Does not have barbs near the mouth ® 10 What do the numbers after the arrows represent?

Refer to this portion of a dichotomous key for fish identification to answer the question. 1. (a) Has a single dorsal fin ® 5 (b) Has a double dorsal fin ® 2 5. (a) Has small fin on back near tail ® 6 (b) Has no fin on back near tail ® 7 6. (a) Has barbs near the mouth ® Catfish (b) Does not have barbs near the mouth ® 10 What is the next step to complete to identify a fish that has a single dorsal fin, no fin on the back near the tail, and no barbs near the mouth?

Which best describes a dichotomous key?