Answer:After puffing off its outer layers, the star collapses to form a very dense white dwarf. One teaspoon of material from a white dwarf would weigh up to 100 tonnes. Over billions of years, the white dwarf cools and becomes invisible.
Explanation: googel hope it helps
Answer:
They bind to an allosteric site which induces a conformational change that increases the affinity of the enzyme's active site for its substrate. This increases the reaction rate.
I'm guessing changing gravity
I believe auxins are used for fast growth in of the stem(shoot), retention of fruits, it induces flowering