All categories

2 years ago

Why is redi's experiment a good example of a controlled experiment

1 answer:

4 0

A controlled experiment is when the experimenter can change one variable in the experiment and completely change the results.

Redi experiment involved a closed jar with rotting meat on the inside. He waited for a few days and found no new forms of life in the jar.
He then did the same experiment, but this time he took the lid off the jar. After those few days he found there were maggots in the rotting meat from flies.

This is a great example of a controlled experiment, because he only had to change one variable to completely change the results. In this case that variable was just removing the lid from the jar.

Redi was trying to prove spontaneous generation with his experiment. Although, it failed.

Spontaneous generation: When life forms from non-livings.

Redi disproved spontaneous generation, but proved biogenesis.

Biogenesis: When life comes from other living beings.

He proved biogenesis because the flies had reproduced when the jar was opened.

You might be interested in

How do glycolysis, pyruvate processing, the Krebs cycle, and the electron transport chain work together to provide energy for th

Ivahew [28]

When the cell gains glucose, the process of glycolysis occurs and then the glucose is broken down into pyruvate.

Now, in pyruvate processing, Acetyl CoA is produced and used in the Krebs Cycle.

During that process, NADH and FADH2 are made and go into the electron transport chain. That is where water and ATP are made.

8 0

2 years ago

You purchased equipment costing $1,000 to use for a lawn-mowing business to earn money for college during the summer. The first

rosijanka [135]

Answer:

$220

Explanation:

For Mowing:

Revenue: $1,200

Additional cost: $(100)

Transportation cost : $(50)

Net Income : $1050

For Painting:

Revenue: $1,400

Additional cost: $(80)

Transportation cost : $(50)

Net Income : $1270

Incremental Net income = $1270 - $1050

= $220

7 0

2 years ago

Describe the events of anaphase

uranmaximum [27]

Answer:

major event of anaphase is the sister chromatids moving to opposite poles of cells due to action of the condensing spindle fibres.

Explanation:

the chromatids only start separating when the pressure is sufficient to split the centromere.

8 0

2 years ago

Explain, in your own words, how you would use the light microscope to view a wet mount of a protist, assuming the microscope is

aev [14]

Answer:

Please find the detailed explanation/description on how to use the light microscope to view a wet mount of a protist. The 9 structures mentioned in the question are in CAPS.

Explanation:

- Firstly, the slide containing the wet mount of the protist is prepared and placed at the centre of a lowered STAGE. The STAGE CLIPS over the sides of the slide are used to hold it in place.

- The revolving turret or nosepiece is turned so that the LOWEST POWER OBJECTIVE LENS is in position i.e. directly above the sample/slide. The SCANNING OBJECTIVE LENS, the lowest objective lens with power of 4x is used initially.

- The slide is viewed through the EYEPIECE, and the image is brought into focus using the STAGE KNOBS.

- The COARSE FOCUS KNOB is turned until the protist on the slide is brought into broad focus. The FINE FOCUS KNOB is then used to bring the image on the slide into sharp focus.

N.B: The OBJECTIVE LENS should not touch the cover slip on the slide during this process.

- When the protist on the slide is clear using lowest power objective lens, the revolver turret can be rotated to allow HIGHER POWER OBJECTIVE LENS.

- Due to higher magnification of the HIGH POWER OBJECTIVE LENS, the protist might need to be refocused using the FOCUS KNOBS.

6 0

3 years ago

Which of the following is an example of passive transport?

Ierofanga [76]

Facilitated diffusion

4 0

3 years ago

Read 2 more answers