The children in ms. murray's class have to perform an investigation. the question their study must answer is "how do various types of plants differ in their physical features? " what type of investigation must the children do?

They would have to observe and record physical characteristics of plants

Explanation: An investigation dealing with differences in the physical features of plants could be studied by observing and recording the physical characteristics of plants.

Plants are easy to grow and observe in nature, so a model would not be necessary.

Finding new plant species is not needed, since most physical features of plants are shared among species (leaves, roots, flowers, etc.).

Also, experimenting on the chemical components of a plant would not tell anything about the physical features.

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides