Biology STAAR Review- Evolution and Classification

Front

What is fitness in the context of natural selection?

Back

Fitness refers to an organism's ability to survive, find a mate, and produce offspring.

Front

What does the cytochrome b protein indicate about relatedness in species?

Back

Differences in the cytochrome b protein can indicate the genetic relatedness between species, with fewer differences suggesting closer relatedness.

Front

What major event is suggested by a decline in the number of taxa of reptiles during the Jurassic period?

Back

A great extinction occurred during the Jurassic period.

Front

How do hybrid species like the white cattail succeed in their environments?

Back

Favorable genes from parental generations provide advantageous characteristics to the hybrid species.

Front

What does the structure of humerus bones in different primate genera suggest?

Back

The observable structures suggest that the primates shared a common ancestor.

Front

Define evolution.

Back

Evolution is the process through which species change over time through mechanisms like natural selection and genetic drift.

Front

What is natural selection?

Back

Natural selection is the process where organisms better adapted to their environment tend to survive and produce more offspring.

Front

What is speciation?

Back

Speciation is the formation of new and distinct species in the course of evolution.

Front

What role do adaptations play in evolution?

Back

Adaptations are traits that enhance an organism's ability to survive and reproduce in its environment.

Front

What is the significance of fossil records in studying evolution?

Back

Fossil records provide evidence of past life forms and their evolutionary changes over time.