Summative Flashcard Review

Front

What is a cladogram?

Back

A cladogram is a diagram that shows the evolutionary relationships among various biological species based on similarities and differences in their physical or genetic characteristics.

Front

What characteristic do all animals to the right of the hagfish have?

Back

Jaws.

Front

What is stabilizing selection?

Back

Stabilizing selection is a type of natural selection that favors average individuals in a population, reducing variation and maintaining the status quo for a particular trait.

Front

What trait was last developed according to the cladogram?

Back

Opposable thumbs.

Front

Which animal is most closely related to humans?

Back

Mouse.

Front

What are the common characteristics of primates?

Back

Primates typically have flexible limbs, forward-facing eyes, and larger brains relative to body size.

Front

What is the significance of opposable thumbs in primates?

Back

Opposable thumbs allow for a better grip and manipulation of objects, which is crucial for tasks like climbing and using tools.

Front

What is the difference between disruptive and directional selection?

Back

Disruptive selection favors extreme phenotypes over intermediate ones, while directional selection favors one extreme phenotype over others.

Front

What is the role of lungs in vertebrate evolution?

Back

Lungs allow for efficient gas exchange, enabling vertebrates to thrive in terrestrial environments.

Front

How do evolutionary relationships help in understanding biodiversity?

Back

Understanding evolutionary relationships helps scientists classify organisms and understand their adaptations and ecological roles.