The work of scientists usually begins with: a) testing a hypothesis. b) careful observations. c) creating experiments. d) drawing conclusions.

The work of scientists usually begins with : B. careful observations

After the observations, the scientist will gather the data and used it to find out the truth about a specific occurrence

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The scientific method or the work of the scientist usually begins with the Careful observations
they first carefully observe the matter or phenomena under consideration then form the hypothesis
so correct option is B
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~potters6/te801/biology/biounits/respiration.htm

The main role of dna in the  cell is the long-term storage of information. it is often compared to a blueprint, since it contains the instructions to construct other components of the  cell, such as  proteins  and rna molecules.the main function of rna is to carry information of amino acid sequence from the genes to where  proteins  are assembled on  ribosomes  in the  cytoplasm. mark brainliest, my work is good.