I think A but you should double check with some one else.
The effect does the chemical referred to as a mutagen has is it causes a permanent change in the genetic material (dna) and is denoted as option D.
<h3>What is DNA?</h3>
This is referred to as deoxyribonucleic acid and is the genetic material in living organisms.
Mutagen on the other hand are agents which cause mutations which means alterations in the DNA of organisms. It affects the transcription and replication of the DNA thereby leading to cell death and other effects such as diseased condition.
This is therefore the reason why option D was chosen as the most appropriate choice.
Read more about Mutagen here brainly.com/question/13837704
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<span>A. genetic variation in species
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Aim/objective: To determine the effect of carbon dioxide concentration on the rate of photosynthesis.Problem statement :What is the effect of carbon dioxide concentration on the rate of photosynthesis? Hypothesis When the concentration of carbon dioxide increases, the rate of <span>photosynthesis also increases until the rate becomes constant.</span>VariablesManipulated : Concentration of carbon dioxideResponding : The rate of photosynthesis// The number ofbubble releasedper minute<span>Constant : Light intensity, temperature/ Size of plant</span> Apparatus and materials:Materials :Elodea/Hydrilla ,different concentration of sodium bicarbonate,distilled water Apparatus : Beaker, boiling tube, clip, table lamp, filter funnel Technique :Count and record the number of bubbles produced / released in 20 minutesusing a stopwatch.Procedure:1<span>.Diagram of experimental setup with at least 5 functional labels.</span><span>2.Fill a boiling tube with</span>150 ml of 1%sodium hydrogen carbonate solution. <span>3.Fix a paper clip / plasticine to a sprig of aquatic /</span>Hydrillasp. plant.4.Submerge / put the aquatic plant into the boiling tube containing1% sodium hydrogen carbonate solution.5.Put the boiling tube into a water bath at room temperature (20-30oC). 6.Place the boiling tube at distance of 50 cm from a lighted bulb. 7.Put aside the boiling tube for 5 minute (for the aquatic plant to adjust).8.Start the stopwatch.9.Count the number of bubbles release in 20 minutes.10.Record the result is a table.11.Repeat steps 2 until10 using 2%, 3%and 4%of sodiumhydrogencarbonate solutions. 12.Calculate the rate of photosynthesis.(Rate of photosynthesis = Number of bubbles/time)13.Precaution : Count the bubbles only after the rate becomesconstant. DataInclude the following titles with units:-Concentration of sodium hydrogen carbonates solution (%)-Number of bubbles released in 20 minutes -Rate of photosynthesis (number / minute) Conclusion:When the concentration of carbon dioxide increases, the rate of <span>photosynthesis also increases until the rate becomes constant. Hypothesis</span><span>is accepted.</span>
