Biology Practice EOC Questions

Front

What is the role of DNA in cells?

Back

DNA contains instructions for producing proteins, which are essential for the structure and function of cells.

Front

How do zebra mussels affect oxygen levels in aquatic ecosystems?

Back

Zebra mussels decrease oxygen levels by promoting algal blooms, which consume oxygen when they decompose.

Front

What is the impact of zebra mussels on fish and amphibian populations?

Back

Zebra mussel populations can cause algal blooms, decreasing oxygen concentration in the water, which can harm fish and amphibian populations.

Front

What factors can lead to low oxygen concentrations in aquatic environments?

Back

High phytoplankton populations can lead to low oxygen concentrations due to increased decomposition and consumption of oxygen.

Front

What is an algal bloom?

Back

An algal bloom is a rapid increase in the population of algae in water, often due to excess nutrients, which can lead to decreased oxygen levels.

Front

What is the significance of oxygen levels in aquatic ecosystems?

Back

Oxygen levels are crucial for the survival of aquatic organisms; low levels can lead to hypoxia, harming fish and other aquatic life.

Front

What is the relationship between phytoplankton and oxygen production?

Back

Phytoplankton produce oxygen through photosynthesis, making them vital for maintaining oxygen levels in aquatic ecosystems.

Front

How can human activities impact zebra mussel populations?

Back

Human activities, such as pollution and habitat alteration, can affect zebra mussel populations and their ecological impacts.

Front

What is the process of transcription in biology?

Back

Transcription is the process by which the information in DNA is copied into messenger RNA (mRNA), which then guides protein synthesis.

Front

What are secondary consumers in an ecosystem?

Back

Secondary consumers are organisms that eat primary consumers; they play a key role in the food web.