In each trial, you will add an indicator to the mystery food sample. But you will also add the
indicator to a known substance and water. Why is
that important? Check all reasons.
to practice measuring volume using the
graduated pipette correctly
D to match the mystery food sample to a
definite positive result (gelatin, oilets.)
to match the mystery food sample to a
definite negative result (water)
to increase the amount of data.
DONE
No

Where do the respiratory and circulatory systems meet? a. in the heart b. in the muscles c. in the lungs d. in the brain

The negative impacts of nonnative species generally outweigh the positive impacts

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.