Answer:
Some plants have the ability to make the stamens mature first before the pistils to prevent itself from self-pollinating. ... If a situation as such would happen, there will be no pollen left in that flower to land on the stigma to start the fertilization of the plant.
Explanation:
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Answer:
Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. As the atrium contracts, blood flows from your right atrium into your right ventricle through the open tricuspid valve.
Explanation:
Enzymes acts as a catalyst in chemical reactions to speed up the rate of reaction.
Enzymes are not necessarily needed because substrates can disintegrate on their own, but enzymes are helpful to aid this process.
