Lesson 19 Flashcards
What are the three major divisions of animals?
Vertebrates or invertebrates
Endothermic or Ectothermic
Bilateral, radial, or asymmetrical symmetry
What are flagella?
Used for movement. They flap and beat moving water, assisting in movement
How do sponges reproduce?
Asexually via budding.
How does sponges Sexual reproduction work?
They release sperm into the ocean, which finds its way to the eggs and fertilizes them.
Are sponges hermaphrodite?
Yes. Meaning they have both female and male reproductive organs
What is the process in which a fertilized egg becomes a multicellular zygote called?
Cleavage
When the cells of a blastula move inside the ball to create layers this is called what?
Gastrulation
Most animals produce 3 germ layers which is not one of those?
Endotherm
Ectotherm
Blastotherm
Mesotherm
Blastotherm
What does the endoderm form??
The lining of the digestive track.
What is mesenchym?
The jelly like substance in between the cellular layers of sea sponges
What are amebocytes?
A group of specialized cells that helps sea sponges with digestion and gas exchange
Collar cells are..
Inside sea sponges and helps the organism trap food.
