In their first round of screening, Beadle and Tatum plated spores on minimal medium. The purpose of this screen was to .
1. eliminate all nonmutant Neurospora from the population
2. determine which of the mutants generated were auxotrophic for thiamine
3. determine whether any auxotrophic mutants had been generated
4. identify which mutants were deficient in vitamin synthesis pathways and which were deficient in amino acid synthesis pathways

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.

What molecules will be best used to compare different species with the exact same sequence of amino acids? why would two species have the same protein even if the molecules in question is different? (hint: transcription to translation to protein).

What terms describes being out of water after being submerged