Genetics
Ecology and Energy Flow
Body Systems
Cell Organelles
Biological Organization
100

These are different forms of a gene, such as B or b.

What are alleles?

100

This term describes living AND nonliving things interacting together.

What is an ecosystem?

100

This organ pumps blood throughout the body.

What is the heart?

100

This organelle makes energy (ATP) for the cell.

What are mitochondria?

100

The heart belongs to this level of organization. ❤️

What is an organ?

200

When an organism has two identical letters (AA or aa), it is described as this.

What is homozygous?

200

These organisms make their own food using sunlight.

What are producers (plants)?

200

This part of the digestive system absorbs most of the nutrients from food.

What is the small intestine?

200

This organelle is found only in plant cells and helps them make food using sunlight.

What are chloroplasts?

200

This is the smallest level of biological organization.

What is a cell?

300

This type of allele shows its trait over a recessive allele, which only shows when two copies are present.

What is a dominant allele?

300

When this type of organism disappears, prey populations grow too large.

What is a predator?

300

This body system moves oxygen and nutrients to all parts of the body.

What is the circulatory system?

300

These cells need extra mitochondria because they use a lot of energy.

What are muscle cells?

300

This level is made up of organs that work together to perform a major function.

What is an organ system?

400

In a Tt × Tt cross, this percent of offspring will be tt (short).

What is 25%?

400

This level of an energy pyramid contains the most energy.

What are plants at the bottom?

400

This system sends electrical signals to help the body respond and function.

What is the nervous system?

400

These tiny organelles build proteins inside the cell.

What are ribosomes?

400

A group of similar cells working together makes this level. 🧩

What is a tissue?

500

A farmer wanting bigger apples should examine this.

What are the plant’s DNA and traits?

500

If all plants died, this would happen to animal populations.

What is they would go down (decrease)?

500

These two systems work together to deliver nutrients from food to your cells.

What are the digestive and circulatory systems?

500

This organelle controls the cell’s activities and stores DNA.

What is the nucleus?

500

Arrange these in the correct order from smallest to largest:
Organ System, Cell, Organism, Tissue, Organ

What is:
Cell → Tissue → Organ → Organ System → Organism?