Animal Development

How many cells does a zygote contain?

• 1
• 2
• 3
• 4

What is a blastula?

• Opening to ball of cells
• Hollow ball of cells
• A fertilized egg
• An indention in a ball of cells

What is the first thing to happen to a blastula when forming the gastrula?

• It gets bigger.
• It gets smaller.
• It indents.

Where is the endoderm?

• Inner layer
• Middle layer
• Outer layer

Where is the ectoderm?

• Inner layer
• Middle layer
• Outer layer

Where is the mesoderm?

• Inner layer
• Middle layer
• Outer layer

What does the mesoderm become?

• Skin
• Digestive system
• Muscle
• Brain

What does the endoderm become?

• Skin
• Muscle
• Digestive system
• Bones

What does the ectoderm become?

• Muscle
• Skin
• Bones
• Digestive system

Tags

NGSS.HS-LS1-4

Which type of animal has no body cavity?

• Acoelomate
• Pseudocoelomate
• Eucoelomate