Life Science Year-End Review

Which organelle is known as the powerhouse of the cell?

• Nucleus

• Mitochondria

• Endoplasmic Reticulum

• Ribosome

What does the skeletal system protect in the human body?

• Blood

• Skin

• Vital organs

• Muscles

What is considered the basic unit of life?

• Cell

• Organism

• Organ

• Tissue

Who is considered the father of genetics?

• Isaac Newton

• Charles Darwin

• Albert Einstein

• Gregor Mendel

What is selective breeding used for?

• To increase genetic diversity

• To clone animals

• To develop specific traits

• To decrease population size

What percentage of offspring from two heterozygous flowers will have a white color if white is a recessive trait?

• 100%

• 75%

• 50%

• 25%

Which of the following is NOT a component of natural selection?

• Overproduction

• Variation

• Artificial selection

• Selection

What type of symbiotic relationship benefits both organisms involved?

• Commensalism

• Mutualism

• Parasitism

• Predation

Which biome is characterized by having four distinct seasons?

• Tundra

• Savanna

• Desert

• Temperate Deciduous Forest

What is the primary difference between prairies and steppes?

• Height of grasses

• Types of animals

• Temperature ranges

• Amount of rainfall