Cell Structure & Function
Levels of Organization
Body Systems Connection
Genes & Traits
Reproduction & Heredity
100

This structure is known as the “control center” of the cell.

What is the nucleus?

100

The smallest unit of life.

What is a cell?

100

This system carries oxygen and nutrients to body cells.

What is the cardiovascular system?

100

DNA is found in this cell structure.

What is the nucleus?

100

Asexual reproduction creates offspring that are genetically ____.

What is identical?

200

The jelly-like substance that holds all organelles in place.

What is the cytoplasm?

200

Similar cells working together form a ____.

What is a tissue?

200

The system responsible for removing waste from the blood.

What is the excretory system?

200

Segments of DNA that determine traits are called ____.

What are genes?

200

Sexual reproduction requires these two cells to combine.

What are egg and sperm?

300

This organelle is the “powerhouse” that converts food into energy.

What is the mitochondria?

300

Different tissues working together form a(n) ____.

What is an organ?

300

The muscular and skeletal systems work together to produce this.

What is movement?

300

The physical appearance of an organism is its ____.

What is phenotype?

300

The cell formed when sperm and egg combine is called a ____.

What is a zygote?

400

Found only in plant cells, this structure provides extra support and shape.

What is the cell wall?

400

A group of organs working together to perform a major function is called a(n) ____.

What is an organ system?

400

The digestive and circulatory systems work together to provide cells with ____.

What are nutrients?

400

An organism with two identical alleles for a trait is ____.

What is homozygous?

400

The passing of traits from parents to offspring is called ____.

What is heredity?

500

These structures in plant cells capture sunlight for photosynthesis.

What are chloroplasts?

500

Order these from smallest to largest: organism, organ, cell, tissue, organ system.

What is cell → tissue → organ → organ system → organism?

500

This system sends and receives messages to control body activities.

What is the nervous system?

500

A Punnett square showing BB × BB predicts what percentage of heterozygous offspring?

What is 0%?

500

Which type of reproduction leads to genetic diversity?

What is sexual reproduction?