STAAR Biology Practice Assessment

Front

What is the significance of different environments in the evolution of species?

Back

Different environments lead to different adaptations in species, resulting in variations even among those with a common ancestor.

Front

How are genes expressed in an organism?

Back

Genes are turned on and off in response to environmental factors, allowing organisms to adapt to changing conditions.

Front

What type of relationship exists between dermatophytes and humans?

Back

Parasitism, as dermatophytes derive nutrients from human skin, causing infections.

Front

Which species is likely to experience the highest rates of evolution based on reproductive rates?

Back

Species that produce a higher number of offspring, such as the Oriental fruit fly, are likely to evolve more rapidly.

Front

What cellular structure is present in eukaryotic cells but not in prokaryotic cells?

Back

Mitochondria, which are involved in energy production, are found in eukaryotic cells but absent in prokaryotic cells.

Front

Define adaptation in the context of evolution.

Back

Adaptation is a trait that enhances an organism's ability to survive and reproduce in its environment.

Front

What is the role of ribosomes in a cell?

Back

Ribosomes are responsible for protein synthesis, translating genetic information into proteins.

Front

Explain the concept of 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 the difference between mutualism and commensalism?

Back

Mutualism benefits both species involved, while commensalism benefits one species without affecting the other.

Front

What is the function of mitochondria in eukaryotic cells?

Back

Mitochondria generate ATP through cellular respiration, providing energy for the cell.