Biology First Partial Review

What is the basic unit of life?

• Cell

• Organ

• Organism

• Tissue

Name three organelles found in eukaryotic cells.

• chloroplast

• ribosome

• cell wall

• nucleus, mitochondria, endoplasmic reticulum

What is the function of the mitochondria?

• The function of the mitochondria is to produce energy (ATP) for the cell.

• To regulate cell division and growth.

• To store genetic information for the cell.

• To synthesize proteins for the cell.

Describe the difference between prokaryotic and eukaryotic cells.

• Prokaryotic cells do not have a nucleus or membrane-bound organelles; eukaryotic cells do.

• Prokaryotic cells contain membrane-bound organelles; eukaryotic cells do not.

• Eukaryotic cells are smaller than prokaryotic cells.

• Prokaryotic cells have a nucleus; eukaryotic cells do not.

What are the main components of an ecosystem?

• Water and soil types

• Photosynthesis and respiration

• The main components of an ecosystem are biotic factors and abiotic factors.

• Producers and consumers

Define a biome and give two examples.

• Tundra

• Wetland

• Desert and Rainforest

• Savanna

What role do producers play in an ecosystem?

• Producers are essential for converting solar energy into chemical energy, supporting all other trophic levels in an ecosystem.

• Producers rely on other organisms for their energy needs.

• Producers are the top predators in an ecosystem.

• Producers are primarily responsible for decomposing organic matter.

Explain the concept of natural selection.

• Natural selection is the mechanism by which individuals with advantageous traits are more likely to survive and reproduce, leading to the gradual evolution of species.

• Natural selection is the belief that species do not change and remain static over time.

• Natural selection refers to the random changes in genetic material that occur over time.

• Natural selection is the process by which all individuals in a population are equally likely to survive.

What is genetic variation and why is it important for evolution?

• Genetic variation is the same as genetic mutation.

• Genetic variation is unimportant for species survival.

• Genetic variation only occurs in plants.

• Genetic variation is the differences in DNA among individuals, and it is important for evolution because it enables adaptation and survival through natural selection.

How does biodiversity contribute to ecosystem resilience?

• Biodiversity contributes to ecosystem resilience by increasing stability and adaptability to environmental changes.

• Biodiversity has no impact on ecosystem adaptability.

• Biodiversity decreases ecosystem stability during climate change.

• Biodiversity only benefits certain species, not the ecosystem as a whole.