Biology 2nd Sem Final Practice

Front

What process directly causes evolution?

Back

Natural selection is the process that directly causes evolution by favoring individuals with traits that enhance survival and reproduction.

Front

Which human activity most directly contributes to the rise in atmospheric CO₂?

Back

Burning fossil fuels is the primary human activity that contributes to the increase in atmospheric CO₂ levels.

Front

What is the best definition of fitness in evolutionary terms?

Back

In evolutionary terms, fitness refers to the ability of an organism to survive and reproduce in its environment.

Front

What sequence of DNA would match this mRNA strand: AUG CCG UAC?

Back

The matching DNA sequence is TAC GGC ATG.

Front

Which process results in speciation?

Back

Reproductive isolation is the process that leads to speciation by preventing different populations from interbreeding.

Front

Define homeostasis.

Back

Homeostasis is the process by which living organisms maintain a stable internal environment despite changes in external conditions.

Front

What is the role of photosynthesis in the ecosystem?

Back

Photosynthesis converts light energy into chemical energy, producing oxygen and glucose, which are essential for life.

Front

Explain the concept of natural selection.

Back

Natural selection is the mechanism by which individuals with favorable traits are more likely to survive and reproduce, leading to evolutionary change.

Front

What is the significance of genetic variation in a population?

Back

Genetic variation is crucial for a population's ability to adapt to changing environments and is a key factor in evolution.

Front

What is the difference between mitosis and meiosis?

Back

Mitosis results in two identical daughter cells, while meiosis produces four genetically diverse gametes.