Yeast food is sugar and its concentration affect yeast’s growth and activity. The process by which yeast metabolize sugar is called fermentation. A sugar concentration that is not very high (up to 3%), increase the fermentation rate. But, with over 3% sugar, the fermentation rate no longer increases. Above 6%, sugar actually decreases the rate because it begins to dehydrate the yeast cells. This effect is called crenation.
Answer:
An echo occurs when a sound wave reflects back towards its source after hitting a hard surface.
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They attract to each other with a force that is proportional to the product of their masses
The correct answer is <span>hollow ball of cells formed after a fertilized cell undergoes cell division.
It is found in the earliest development of mammals and an embryo forms out of it.
</span><span>The definition of blastocyst
mammalian blastula in which some differentiation of cells has occurred.</span>
