Human Biology

Front

What is the fossil record?

Back

The fossil record is a historical archive of life on Earth, consisting of all the fossils that have been discovered and documented, which provides evidence for the evolution and extinction of species.

Front

How do scientists use the fossil record?

Back

Scientists use the fossil record to gather evidence to help them form theories about the history of life on Earth.

Front

What is angiogenesis?

Back

Angiogenesis is the process of forming new blood vessels from existing ones.

Front

Why is angiogenesis a common sign of cancer?

Back

Angiogenesis is common in cancer because tumors stimulate the growth of new blood vessels to supply cancerous cells with more energy and nutrients.

Front

What is a prokaryotic cell?

Back

A prokaryotic cell is a type of cell that lacks a nucleus and membrane-bound organelles, typically characterized by a single circular chromosome.

Front

What is a characteristic of a prokaryotic cell?

Back

A characteristic of a prokaryotic cell is the presence of a single circular chromosome.

Front

What are homologous structures?

Back

Homologous structures are anatomical features in different species that share a common ancestry, even if they have different functions.

Front

Give an example of homologous structures.

Back

The human arm, whale fin, and bat wing are examples of homologous structures.

Front

What are analogous structures?

Back

Analogous structures are features in different species that serve similar functions but do not share a common ancestry.

Front

What is an invasive species?

Back

An invasive species is a non-native species that spreads widely in a new habitat, often causing harm to local ecosystems.