51: Scarce Conditions

**51: Scarce Conditions** is the fiftyoneth level of the game.

## Description

"We now have access to two new cells, Senseocyte and the Sterocyte. They can sense smell from either food or cells of certain colors. The Senseocyte will output a signal substance based on the smell molecule concentration. The Stereocyte will output a signal substace based on left-right concentration gradient of smell molecules. Food is mow very scarce, can you figure out a way to survive on this substrate?"

### Substrate Settings

* Maximum cell count: 800
* Petri dish diameter: 2.0 mm
* Substrate viscosity: 60.000
* Dynamic friction: 0.000
* Static friction: 0.000
* Salinity: 1
* Light amount: 0
* Light range: 0

## Solution

In all Scarce Conditions challenges, there is food scattered sparsely around the plate, making it impossible for normal organisms to survive. How do we solve these? The key to all three is to use stereocytes. If we make the different stereocyte signals trigger different flagellocytes, then we can get an organism go to where food is on its own. Let's see how we make the genome. First, set M1 to be a lipocyte at slightly lower than default split mass. Have it split into M2 and M3 with maximum adhesin stiffness. Next, set both M2 and M3 to be lipocytes with a split angle of 90 degrees, minimum split mass, and maximum adhesin stiffness. For M2, make its child 1 angle 315 degrees and child 2 angle 300 degrees. Then for M3, set its child 1 angle to 330 degrees and child 2 angle to 315 degrees. Make M2 split into M4 and M5, and also make M3 split into M6 and M7. For now prevent M4, M5, M6, and M7 from splitting to make it easier to work with. Keep M7 as a phagocyte but have M6 be a flagellocyte. Also have M4 be a stereocyte and M5 be a flagellocyte. Now let's tune the stereocyte settings. Set it's sense to food and have an output around 20.00. It doesn't matter the signal type as long as the flagellocytes can use it. Next, set the right flagellocyte's "a" value to around 0.76 and a "b" value a little bit greater than 0. Do the same thing for the left flagellocyte but with a negated "a" value around -0.76. If you're trying to solve Scarce Conditions III, I recommend you reduce the nutrient priority of the flagellocytes by a little bit. Now we can get to reproduction. Set the stereocyte's split mass to what you think is around default and have it's child 1 be M1. Make sure to set the stereocyte's max connections to 3 to prevent making new M1 cells while there is already one connected to it. Again, if you're trying to solve Scarce Conditions III, I recommend cranking the nutrient priority by a little. Finally, we can insert M1 into the substrate! But before we do that, make sure M1's children don't keep adhesin otherwise the any M1 that splits while connected to your organism will wind up developing while still being connected. After you do that quick change, insert M1 into the plate! After a little while, what should've happened was that there was a lot of surviving cells on the plate, and you completed the challenge!

## Trivia

* →
* Hint
* Spoiler

Click a Tab to reveal the Hint.

Use the Stereocyte and Myocyte for steering towards food. Think about the placement of the cells within your organism.

Make a simple swimmer so that once it gets enough food it will split into a four-celled linear organism, Flagellocyte-Myocyte-Stereocyte-Phagocyte. Make the Myocyte bend according to the smell direction picked up by the Stereocyte. Turning the Myocyte response is crucial and requires some experimenting. Let the Phhagocyte split off the simple swimmers that will sometimes be lucky and develop into these four-celled navigating swimmers and thus letting your organism reproduce. Setting the adhesin strength high and tuning the split masses is crucial