A group of similar cells that perform a specific function.
What is a tissue.
100
Tiny structures produced by seed plants that contain the cell that later becomes a sperm cell.
What is pollen.
100
An animal with a backbone.
What is a vertebrate.
100
The highest level of organization an animal can have is __________.
What is organ systems.
200
A green photosynthetic pigment found in the chloroplast of plants, algae, and some bacteria.
What is chlorophyll.
200
A low-growing plant that lacks true vascular tissue for transporting materials.
What is a nonvascular plant.
200
An animal without a backbone.
What is an invertebrate.
200
Animals without symmetry have no tissues. Animals with __________ symmetry have tissues and usually have organ systems. Animals with bilateral symmetry have organ systems.
What is radial.
300
For plants to survive on land, they must have ways to obtain water and nutrients, retain water, __________ their bodies! transport materials! and reproduce.
What is support.
300
Seed plants have vascular tissue and __________.
What is seeds.
300
Animals are classified according to how they are related to other animals. These relationships are determined by an animal's body structure, the way the animal develops, and it's __________.
What is DNA.
300
A body plan in which ANY NUMBER of imaginary lines that all pass through a central point divide the animal into two mirror images.
What is radial symmetry.
400
An organelle in the cells of plants and some other organisms that captures energy from sunlight and changes it to an energy form that cells can use in making food.
What is chloroplast.
400
The vascular tissue through which food moves in some plants.
What is the phloem.
400
The presence of a __________ determines whether an animal is a vertebrate or an invertebrate.
What is a backbone.
400
A body plan in which a SINGLE imaginary line divides the body into left and right sides that are mirror images of each other.
What is bilateral symmetry.
500
The structure that helps prevent water loss.
What is the cuticle.
500
The vascular tissue through which water and minerals move in some plants.
What is the xylem.
500
The main functions of an animal are to obtain __________, obtain oxygen! keep internal conditions stable! move in some way, and reproduce.
What is food.
500
The __________ of an animal's cells into higher levels of structure helps to describe an animal's body plan.