Mateusz Bolewski
--- a/src/components/Map/Drawer/SearchDrawerWrapper/GroupedSearchResults/BioEntitiesAccordion/BioEntitiesSubmapItem/BioEntitiesSubmapItem.component.tsx
+++ b/src/components/Map/Drawer/SearchDrawerWrapper/GroupedSearchResults/BioEntitiesAccordion/BioEntitiesSubmapItem/BioEntitiesSubmapItem.component.tsx
+  mapId,
  numberOfEntities,
  bioEntities,
 }: BioEntitiesSubmapItemProps): JSX.Element => {
  const dispatch = useAppDispatch();
+  const openedMaps = useAppSelector(mapOpenedMapsSelector);
+
+  const isMapAlreadyOpened = (modelId: number): boolean =>
+    openedMaps.some(map => map.modelId === modelId);

  const onSubmapClick = (): void => {
+    if (isMapAlreadyOpened(mapId)) {
+      dispatch(setActiveMap({ modelId: mapId }));
+    } else {
+      dispatch(openMapAndSetActive({ modelId: mapId, modelName: mapName }));
+    }
--- a/src/components/Map/Drawer/SearchDrawerWrapper/GroupedSearchResults/BioEntitiesAccordion/BioEntitiesSubmapItem/BioEntitiesSubmapItem.component.tsx
+++ b/src/components/Map/Drawer/SearchDrawerWrapper/GroupedSearchResults/BioEntitiesAccordion/BioEntitiesSubmapItem/BioEntitiesSubmapItem.component.tsx
      onClick={onSubmapClick}
      type="button"
      className="flex flex-row flex-nowrap items-center justify-between pl-6 [&:not(:last-of-type)]:pb-4"
+      data-testid="bio-entites-submap-button"
    >
      <p className="text-sm font-normal">
        {mapName} ({numberOfEntities})
      </p>
-      <Icon name="arrow" className="h-6 w-6 fill-font-500" />
+      <div data-testid="arrow-icon">
--- a/src/components/Map/Drawer/SearchDrawerWrapper/GroupedSearchResults/BioEntitiesAccordion/BioEntitiesSubmapItem/BioEntitiesSubmapItem.component.test.tsx
+++ b/src/components/Map/Drawer/SearchDrawerWrapper/GroupedSearchResults/BioEntitiesAccordion/BioEntitiesSubmapItem/BioEntitiesSubmapItem.component.test.tsx
+    await act(() => {
+      navigationButton.click();
+    });
+
+    const {
+      drawer: {
+        searchDrawerState: { stepType, selectedValue, currentStep, listOfBioEnitites },
+      },
+    } = store.getState();
+
+    expect(stepType).toBe('bioEntity');
+    expect(selectedValue).toBe(undefined);
+    expect(currentStep).toBe(SECOND_STEP);
+    expect(listOfBioEnitites).toBe(bioEntitiesContentFixture);
+  });
+  it("should open submap and set it to active if it's not already opened", async () => {