This protective layer surrounds every cell and controls what substances can pass through it.
What is the cell membrane?
This tough structure surrounds a plant cell and helps it keep its shape.
What is the cell wall?
Unlike plant cells, animal cells do not have this rigid structure surrounding the cell membrane.
What is a cell wall?
Cells divide to create new cells for these two reasons.
What are growth and repair?
A group of cells of the same type that work together forms this.
What is tissue?
This is the gel-like part of the cell where the organelles are found.
What is the cytoplasm?
This organelle contains chlorophyll and helps plants make food.
What is a chloroplast?
These tiny structures help build proteins needed for cell functions.
What are ribosomes?
During this first stage of cell division, the nucleus divides into two parts.
What is mitosis?
Several different types of tissue working together form this.
What is an organ?
This organelle controls the activities inside the cell and contains chromosomes with DNA.
What is the nucleus?
Most plant cells have one large, permanent version of this fluid-filled structure containing cell sap.
What is a vacuole?
These organelles destroy invading bacteria and parts of the cell that are no longer needed.
What are lysosomes?
The two new nuclei produced during mitosis are called these.
What are daughter nuclei?
A group of organs that works together to perform a particular job is called this.
What is a system?
These organelles convert simple substances into energy for the cell.
What are mitochondria?
These column-shaped cells are found just beneath the upper surface of a leaf and contain many chloroplasts.
What are palisade cells?
Cells with different shapes and structures that allow them to perform particular jobs are examples of this process.
What is specialization?
This second stage of cell division divides the cytoplasm and completes the separation into two cells.
What is cytokinesis?
The stomach and intestines are examples of these structures in a frog's digestive system.
What are organs?
This organelle stores and distributes substances made inside the cell.
What is the Golgi complex?
These cells are found inside a leaf and have irregular shapes that allow spaces for air to form between them.
What are spongy cells?
Column-shaped cells that allow substances to pass through them can join together to form this level of organization.
What is tissue?
In a plant cell, this structure forms down the middle of the cytoplasm to separate the two new cells.
What is the cell plate?
All of an organism's systems work together to make up this.
What is an organism?