A biologist is conducting an experiment to determine how light affects the reproduction of Bacteria X. The biologist is trying to decide the best way to conduct his experiment in order to collect meaningful data.

Which of the following experiments would help him collect the best data?

The best way by which the biologist can conduct his experiment -in order to collect meaningful data- is place a Petri dish with Bacteria X in a lighted area and a Petri dish with the Bacteria X in a darkened area, and then observe the rate of reproduction over time.

Explanation:

Options for this question are:

A.  Place a Petri dish with Bacteria X in a lighted area and a Petri dish with the Bacteria X in a darkened area, and then observe the rate of reproduction over time.

B.  Place a Petri dish with Bacteria X in a lighted area and a Petri dish with Bacteria Y in a darkened area, and then observe the rate of reproduction over time.

C.  Place a Petri dish with Bacteria X in a sunny window and an identical Petri dish under a grow lamp.

D.  Place a Petri dish with Bacteria X in a moist, dark area and record the rate of reproduction over time.

The aim of the biologist is clearly to see how light influences the reproduction of bacteria X. In this case, the design of the experiment is simple, as he must separate his sample into two groups, exposing each group to controlled conditions, light and dark.

The stimulus, presence or absence of light, is the independent variable, while the rate of reproduction is its dependent variable.

If the biologist observes that bacteria X reproduce better in the illuminated area, it means that light is a factor that promotes reproduction in that bacteria, or that darkness negatively affects reproduction.

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Example of an experiment with bacteria link

you are certainly talking about this picture:

a: is the label of the white square, it is showing the  replication fork, formed by helicase (d) ==> so it is the site of dna separation and replication 

b: is a new dna brand that is following directly the replication fork, so it is continuous ==> built continuously from 5' to 3

c: dna polymerase cannot replicate dna on its own, it needs the of their proteins, and one of them plays the role of a clamp which fixes  the dna with the dna template and increases  the processivity of the enzyme. ==>   stops polymerase from falling off the  template.

d: is the enzyme responsible for forming the replication fork (helicase) ==> unwinds and separates dna into two strands

e: is the delayed strand, it is built  in the opposite sense of the helicase, so dna will be built in fragments ==> built  fragments from 5' to 3 joins

and finally f: is the enzyme that builds  the new dna strand (dna polymerase) ==>   adds nucleotides to make a new dna helix.

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hey bro i looked it up on google the structure of the eye-spot in euglena viridie, e. ehrenbergii, and phacus pyriyorme is not as franzé haa described it. the so-called “crystal body” and “lens bodies” were not found in any of the individuals of the species examined by me. as earlier observers have stated, the eye-spot consists simply of a mass of pigment granules arranged in a single layer, and probably embedded in a protoplasmic framework, but the latter could not be seen, and its presence was only inferred from the fact that the pigment granules must be held together in some way, thd the eye-spot as a whole is capable of expansion, and that the pigment granules can be separated from each other.

hope this   and an i get brainlsiest