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g100num [7]
3 years ago
9

What was the control in Redi's experiment? A. Meat covered by jars that didn't have contact with air B. A straight neck flask to

allow air to get in C. Uncovered meat that had contact with air D. A swan neck flask that prevented air from getting in
Biology
1 answer:
alina1380 [7]3 years ago
7 0

Answer:

The correct answer is option C. "Uncovered meat that had contact with air".

Explanation:

In 1668, the Italian scientist Francesco Redi performed a celebrated experiment to prove that maggots are not spontaneously created by placing fresh meat in each of two different jars: one opened and one covered with a cloth. Redi used an uncovered meat that had contact with air as a control, expecting that flies will come in and the maggots will be developed as they do in nature.

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Explanation:

A neurotransmitter is di uses across a synaptic cleft from a neuron to a muscle cell. Neurotransmitters are chemicals which enable neurotransmission.  In reaction to an impulse a motor neuron axon secretes a neurotransmitter and causes the muscle fiber to contract. It is a chemical messenger which passes on the signals across the chemical synapse.

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3 years ago
When using a light microscope, focus the specimen with the scanning objective lens first.
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<h3>Why is choosing a direction necessary? </h3>

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When compared to modern giraffes, the giraffe's ancient predecessors had a shorter neck. The plants that were lying at a higher level were inaccessible to them. Giraffe phenotypes have changed in various ways, and now have long necks to reach vegetation that is higher up. The extreme form is chosen above other features in directional selection. It was decided to choose the long-necked giraffe over the short-necked.

 

To know more about direction selection for longer necked giraffes visit:

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1 year ago
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B.

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