Biology EOC questions 2 - Copied from another published flashcard.

Front

What is DNA?

Back

DNA (Deoxyribonucleic Acid) is the molecule that carries the genetic instructions for life. It is composed of two strands that coil around each other to form a double helix.

Front

What is the role of crossing-over in genetics?

Back

Crossing-over is a process during meiosis where homologous chromosomes exchange genetic material, leading to genetic variation in offspring.

Front

What is predation?

Back

Predation is a biological interaction where one organism (the predator) hunts and eats another organism (the prey). It can affect population dynamics.

Front

What are the phases of the cell cycle?

Back

The cell cycle consists of interphase (G1, S, G2) and mitotic phase (M), where the cell grows, replicates its DNA, and divides.

Front

What is Cytarabine and its effect on the cell cycle?

Back

Cytarabine is a chemotherapy drug that primarily affects the S phase of the cell cycle, inhibiting DNA synthesis.

Front

What is the significance of observable structures in biology?

Back

Observable structures, such as cells and tissues, provide evidence for biological functions and processes, supporting scientific conclusions.

Front

What is genetic variation?

Back

Genetic variation refers to the differences in DNA sequences among individuals, which can lead to different traits and adaptations.

Front

What is the function of chromosomes?

Back

Chromosomes are structures within cells that contain DNA and proteins; they ensure DNA is accurately replicated and distributed during cell division.

Front

What is the difference between mitosis and meiosis?

Back

Mitosis results in two identical daughter cells for growth and repair, while meiosis produces four genetically diverse gametes for reproduction.

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.