I'm on a timer
an ultrasound machine is being used to try to identify potential kidney stones. the machine is working properly and no kidney stones are found.
which statement best describes this situation?
1 the generated sound wave will not be able to reflect off of the object.
2 the sound wave will not be generated, so there will be no echoes received.
3 the echoes will be made but will not be able to be received by the machine.
4 the machine will not be able to process the received echoes into images.

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.