Answer:
Hey there.
<em><u>There are three types of scientific investigations: descriptive, comparative, and experimental scenitific investigations.
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<em><u></u></em>
fist we have <em><u>Descriptive</u></em> scientific investigations.
Descriptive investigations use careful observations and measurements to develop findings.
Then we have <em><u>
comparative </u></em>Investigation.
comparative investigations Involve collecting data on different populations/organisms, under different conditions (Times of year, locations), to make a comparison. for Example, Using a hand lens to examine the color and texture of four different rocks.
Lastly we have <em><u>experimental</u></em> scientific investigations.
Experimental investigations involve a process in which a "fair test" is designed and variables are actively manipulated, controlled,
I hope it helped!!!
<em>Wbob1314</em>
Phoebus Levene was the one who proposed <span>the polynucleotide model stating that dna and rna were composed</span>
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Answer:
It is the cycle when the reproductive organs start to fertilize. Another form of this is called the menstural cycle when natural changes in the uterus and ovaries to make reproduction possible soon.
