Cladistics Worksheet
Explore the principles of cladistics, phylogenetic trees, and the classification of organisms based on shared derived characteristics.
Includes
Standards
Topics
Cladistics: Understanding Evolutionary Relationships
Name:
Date:
Score:
Read each question carefully and provide your best answer. Refer to your knowledge of cladistics and evolutionary relationships.
1. Which of the following best describes a cladogram?
A diagram showing feeding relationships in an ecosystem.
A phylogenetic tree that illustrates evolutionary relationships based on shared derived characteristics.
A chart that categorizes organisms based on their habitats.
A graph tracking population growth over time.
2. What is a 'shared derived character' (synapomorphy) in cladistics?
A trait found in all organisms being studied.
A trait unique to one specific organism in the group.
A trait that evolved in the common ancestor of a group and is shared by its descendants.
A trait that developed independently in different lineages.
3. The principle of suggests that the simplest explanation for evolutionary relationships is usually the correct one.
4. A group that includes a common ancestor and all of its descendants is called a group.
5. A character state that is ancestral to the group is known as a .
6. Explain the difference between a homologous character and an analogous character in the context of cladistics.
7. All phylogenetic trees are cladograms.
True
False
8. Outgroups are used in cladistic analysis to help determine the ancestral and derived states of characters.
True
False
9. Observe the cladogram below and answer the following questions:
a) Which two organisms are most closely related?
b) What is the common ancestor of all organisms shown in this cladogram?
Related Worksheets
Phylogenetic Tree Worksheet
Explore the principles of phylogenetic trees, common ancestry, and evolutionary relationships among organisms.
Blood Sugar Regulation Worksheet
A Grade 10 science worksheet covering the regulation of blood sugar, including the roles of insulin, glucagon, and the pancreas.
Bacterial Transformation Worksheet
This worksheet covers key concepts in bacterial transformation, including the process, mechanisms, and applications.
Cell Environments Worksheet
Explore the principles of cell environments, including osmosis, diffusion, active transport, and their effects on plant and animal cells.
Bone Markings Worksheet
A Grade 10 Science worksheet focusing on the identification and function of various bone markings.
Properties of Carbon Worksheet
Explore the unique properties of carbon, its atomic structure, bonding capabilities, and its importance in organic chemistry and living organisms.
Human Skull Anatomy Worksheet
A Grade 10 science worksheet focusing on the anatomy and functions of the human skull, including its various bones and protective role.
Grade 10 Biology: Heart Structure Worksheet
A comprehensive worksheet for Grade 10 Biology students covering the structure and function of the human heart.