5/6 Science - Ch. 9 Lesson 1 - What are animals?
adaptation
An inherited trait that increases an organism's chances of surviving and reproducing in its environment is called a what?
imprinting
Baby geese learning to follow their mother soon after birth is a learned behavior known as what?
nucleus
Each animal and plant cell have this structure. What is the structure?
zygote
Each animal begins as a fertilized egg. This is called what?
external
Fertilization that occurs in the water is what type of fertilization?
internal
Fertilization that occurs inside the female is what type of fertilization?
closed
In this type of circulatory system, a heart or hearts pump blood through a system of vessels.
open
In this type of circulatory system, a heart pumps blood into open spaces around the organism's organs.
nerve
Only animals have this type of cells.
family tree
Relationships among and within generations of a family are shown in a what?
kingdom
The second level of taxonomy consists of the _______ taxons.
instincts
These are behaviors that animals are born with.
taxons
These are groups of living things that have certain traits in common.
domains
These are the biggest groups in taxonomy.
symmetry
This describes the way in which an animal's body parts are arranged.
taxonomy
This is a system that groups living things into level called taxons.
radial
This is a type of symmetry in which an organism can be divided into two parts that are nearly mirror images of each other anywhere through its central axis.
bilateral
This is a type of symmetry in which an organism can be divided into two parts that are nearly mirror images of each other.
asymmetry
This is a type of symmetry in which an organism cannot be divided into any two parts that are nearly mirror images.
multicellular
This is an organism that is made up of more than one cell.
hydrostatic
This type of skeleton has a fluid-filled internal cavity surrounded by muscle tissue.
exoskeleton
This type of skeleton is a thick, hard outer covering that protects soft internal structures.
endoskeleton
This type of skeleton is an internal rigid framework. Humans have this type of skeleton.
zoo
This word comes from the Greek word zoion, which means "living being" or "animals."
food
What do animals get energy from?