Question

Describe the use of each of these data sources in phylogeny, and describe some of the difficulties with the data.

Source of Data | Definition | Use of Data | Difficulties
Morphology
Molecular Data

Answer 1

Scientists use morphology and molecular data to construct and revise animal phylogeny. However, both data sources have limitations.

Step-by-step explanation:

In the field of biology, scientists use multiple data sources to construct and revise animal phylogeny. These include:

• Morphology: This refers to the study of the form and structure of organisms. It includes characteristics such as body shape, skeletal structure, and anatomical features.
• Molecular Data: This involves analyzing the DNA or protein sequences of organisms. It provides information on genetic similarities and differences between species.

However, both data sources have their limitations. Morphology can sometimes lead to erroneous evolutionary relationships if closely related lineages evolve under different environments or after major adaptations. Molecular data, on the other hand, requires accurate sequencing and can be influenced by factors like genetic variation and horizontal gene transfer.