Pasteur produced a nutrient broth and placed equal amounts of it in two long necked flasks. One flask had a straight neck (control) and the other had a swan shaped bent neck (being tested). He boiled the broth in both the flasks to kill any living organism that might be surviving on it. The two flasks were then left in the open air of the room to cool down. After several days passed, Pasteur noticed that the broth in the straight necked flask had changed its color but the swan necked flask didn't. From this observation he was able to conclude that the straight necked flask had let the organisms enter the flask and contaminate the broth. The swan necked flask blocked the entry of the organisms from the open air and thus remained unaffected.
They are said to be “denser” than air. what happens is that light slows down when it passes from the less dense air into the denser glass of water. this slowing down the ray of light also causes the ray of light to change directions. it is the change in the speed of the light that causes refraction.
Answer:
<h2>TRUE </h2>
Explanation:
Normally , substrates bind to the active site of the enzyme and catalyzes the reaction.
If there is sufficient amount of enzyme present, the reaction rate increases, because additional active sites could speed up the reaction. As the amount of enzyme is increased , the rate of reaction increases.
If there is insufficient amount of enzyme present , The reaction rate increases , but not so fast as it otherwise would.
Hence the statement an increase in the concentration of enzyme will increase the reaction rate is true.
Answer:
Explanation:
You can understand from the name as it is reproduction re again production. The producing of offspring by sexually or asexual method is call reproduction
Environmental eDNA refers to DNA which are extracted from environmental samples without first isolating any target organism.
eDNA is of special interest to conservation scientists because it is a powerful tool for detection and monitoring of rare species including threatened native species and recently arrived invasive species.
