Yeast is a helpful fungus. it is used in the production of many edible foods such as beer, wine and bread. It helps bread to expand as the yeast, when left in a warm area, releases carbon dioxide which causes the bread to rise.
IF YOU ARE REFERRING TO YEAST INSIDE THE AREAS NECESSARY FOR FEMALE REPRODUCTION: Yeast isn't necessarily "helpful" or "not helpful." Its similar to bacteria in your mouth. There is nothing harmful about yeast it just simply exists so long as you have the parts where it lives. It will kill any general form of other bacteria foreign to it, but when more yeast is produced than is normal for a woman, like when taking antibiotics, after pregnancy, or changing hormone suppliments (Birth Control), your body is told to produce more yeast, causing a yeast infection. SO if that wasn't what you were asking about... I apologize for the images or thoughts I forced you to think about. If it was... I would be happy to give you some more info, just ask!
Yeast makes bread. People eat bread.
yeast is also used to make beer, wine, nutritional products - savoury yeast flakes, probiotic supplements, and some yeasts have been studied extensively in science to understand genetics.
Yeast ferments and creates alcohol.
It helps bread raise.
For making bread
mould is a helpful one and bacteria is a harmful one
If you need help I recommend you type in the specific question you need help with
Bacteria would consider benefitial and harmful bcz many food component are you eating made by bacterial reactions like yeast... but most of spp. are harmful.
it can be helpful or harmful
sometimes they are helpful and harmful.
is yeast dangerous or harmful
Bacteria can be both harmful and helpful
Sandpaper is both helpful and harmful.
they are helpful not harmful to plants
harmful
Depends on what part of "harmful" or "helpful" you are referring to.
helpful