Skip to main content
Back

BIO 104 – Animal Diversity, Chordates, and Mammals: Step-by-Step Study Guidance

NotesPracticeVideo lessons

Study Guide - Smart Notes

Tailored notes based on your materials, expanded with key definitions, examples, and context.

Q2. What are the basic characteristics of animals? How do they differ from the other kingdoms?

Background

Topic: Animal Kingdom Characteristics

This question tests your understanding of what defines animals as a group and how they are distinct from other kingdoms such as plants, fungi, and protists.

Key Terms:

  • Multicellularity

  • Heterotrophy

  • Cell structure (lack of cell walls)

  • Motility

  • Specialized tissues

Step-by-Step Guidance

  1. List the main characteristics that all animals share (e.g., multicellular, eukaryotic, heterotrophic, etc.).

  2. Compare these characteristics to those of other kingdoms (plants, fungi, protists, etc.).

  3. Think about how animals obtain energy and nutrients compared to plants and fungi.

  4. Consider structural differences, such as the presence or absence of cell walls and types of tissues.

Try solving on your own before revealing the answer!

Q3. What is a body plan? How are they used to help scientists understand animals?

Background

Topic: Animal Body Plans

This question is about the concept of a 'body plan' and its importance in classifying and understanding animal diversity.

Key Terms:

  • Body plan

  • Symmetry (radial, bilateral)

  • Tissues, germ layers

  • Body cavity (coelom)

Step-by-Step Guidance

  1. Define what a 'body plan' is in the context of animal biology.

  2. Identify the main features that make up an animal's body plan (symmetry, number of tissue layers, presence of a body cavity, etc.).

  3. Explain how these features help scientists group and compare different animals.

  4. Think about examples of how body plans are used in evolutionary biology.

Try solving on your own before revealing the answer!

Q4. Three germ layers…what are they and what do they generally give rise to in vertebrates?

Background

Topic: Embryonic Development and Germ Layers

This question focuses on the three primary germ layers formed during embryonic development and their roles in forming tissues and organs in vertebrates.

Key Terms:

  • Ectoderm

  • Mesoderm

  • Endoderm

Step-by-Step Guidance

  1. Name the three germ layers formed during gastrulation in vertebrate embryos.

  2. For each germ layer, list the major tissues or organ systems it gives rise to (e.g., ectoderm forms nervous system and skin).

  3. Think about examples of organs or structures derived from each layer.

  4. Consider why having three germ layers is important for complex body structures.

Try solving on your own before revealing the answer!

Q5. Body cavity…what’s the purpose of them?

Background

Topic: Animal Body Cavities (Coelom)

This question is about the function and significance of body cavities in animals, especially in terms of organ development and movement.

Key Terms:

  • Coelom

  • Acoelomate, pseudocoelomate, coelomate

Step-by-Step Guidance

  1. Define what a body cavity (coelom) is in animals.

  2. Describe the main functions of a body cavity (e.g., space for organ development, movement, cushioning).

  3. Compare animals with and without a true coelom.

  4. Think about how the presence of a coelom relates to animal complexity and movement.

Try solving on your own before revealing the answer!

Q6. How do chordates differ from invertebrates? What do we have more of – chordates (vertebrates) or invertebrates?

Background

Topic: Chordates vs. Invertebrates

This question asks you to compare the defining features of chordates and invertebrates, and to consider their relative abundance.

Key Terms:

  • Chordate

  • Invertebrate

  • Notochord, dorsal nerve cord, pharyngeal slits, post-anal tail

Step-by-Step Guidance

  1. List the defining characteristics of chordates.

  2. Identify which of these features are absent in invertebrates.

  3. Consider the diversity and number of species in each group.

  4. Think about examples of chordates and invertebrates to support your comparison.

Try solving on your own before revealing the answer!

Q8. Key characteristics of phylum Arthropoda

Background

Topic: Arthropod Diversity

This question focuses on the main features that define arthropods, the largest animal phylum.

Key Terms:

  • Exoskeleton

  • Segmented body

  • Jointed appendages

  • Molting (ecdysis)

Step-by-Step Guidance

  1. List the defining features of arthropods (exoskeleton, segmentation, jointed limbs, etc.).

  2. Explain the function of the exoskeleton and why molting is necessary.

  3. Describe how segmentation and jointed appendages contribute to arthropod diversity.

  4. Think of examples of arthropods and how these features are seen in them.

Try solving on your own before revealing the answer!

Q11. What are some benefits for marine fish to transition to land? What were some adaptations?

Background

Topic: Evolutionary Transition from Water to Land

This question explores the evolutionary advantages and adaptations that allowed vertebrates to move from aquatic to terrestrial environments.

Key Terms:

  • Adaptation

  • Lungs, limbs, amniotic egg

  • Desiccation resistance

Step-by-Step Guidance

  1. List the challenges marine fish would face on land (e.g., breathing air, movement, drying out).

  2. Identify the adaptations that helped overcome these challenges (e.g., development of lungs, limbs, skin changes).

  3. Explain the benefits of moving to land (e.g., new food sources, fewer predators).

  4. Think about examples of transitional fossils or living species that show these adaptations.

Try solving on your own before revealing the answer!

Q13. Mammals: Understand the characteristics of mammals in general and of each of the 3 mammal lineages. How are they similar, how are they different? Know some examples of each. What is a benefit of the marsupial way of rearing offspring? What about the state of development of offspring for each?

Background

Topic: Mammalian Diversity and Reproduction

This question covers the defining features of mammals, the differences among monotremes, marsupials, and placental mammals, and their reproductive strategies.

Key Terms:

  • Mammary glands

  • Hair/fur

  • Monotremes, marsupials, placentals

  • Placenta, pouch, egg-laying

Step-by-Step Guidance

  1. List the general characteristics shared by all mammals.

  2. Describe the three main mammal lineages and their reproductive strategies.

  3. Compare and contrast the development of offspring in each group.

  4. Give examples of animals from each lineage.

  5. Explain the advantages of the marsupial method of rearing offspring.

Try solving on your own before revealing the answer!

Pearson Logo

Study Prep