BIO 1002 Exam 3 Pomarico LSU Latest
(2026/27) Comprehensive Questions and
Answers A+ Graded
Bilaterally symmetrical animals have three tissue layers that arise during
embryonic development: The inner layer is the
Endoderm
Bilaterally symmetrical animals have three tissue layers that arise during
embryonic development: The outer layer is the
Ectoderm
Bilaterally symmetrical animals have three tissue layers that arise during
embryonic development: The layer in the middle
Mesoderm
a fluid-filled cavity completely lined with a thin layer of tissue that develops
from the mesoderm. It separates the body wall from the inner organs.
Coelom
a body cavity that is not completely surrounded by mesoderm-derived tissue.
Pseudocoelom
, the concentration of sensory organs and nervous tissue in a defined head region
of the body.
Cephalization
During their development, insects undergo ???, a radical change from a juvenile
body form to an adult body form
Metamorphosis
In organisms with an open circulatory system, blood empties into the ??? where
it bathes the internal organs directly.
hemocoel
Animals lack a cell wall- True or False?
True
One trend in the evolution of animals is the increase in the number of tissue
(germ) layers during embryonic development. Flatworms and more complex
animals have ________ layers.
3
Most animal phyla are radially symmetrical. True or False?
False
All animals with tissues have what?
Symmetrical bodies
(2026/27) Comprehensive Questions and
Answers A+ Graded
Bilaterally symmetrical animals have three tissue layers that arise during
embryonic development: The inner layer is the
Endoderm
Bilaterally symmetrical animals have three tissue layers that arise during
embryonic development: The outer layer is the
Ectoderm
Bilaterally symmetrical animals have three tissue layers that arise during
embryonic development: The layer in the middle
Mesoderm
a fluid-filled cavity completely lined with a thin layer of tissue that develops
from the mesoderm. It separates the body wall from the inner organs.
Coelom
a body cavity that is not completely surrounded by mesoderm-derived tissue.
Pseudocoelom
, the concentration of sensory organs and nervous tissue in a defined head region
of the body.
Cephalization
During their development, insects undergo ???, a radical change from a juvenile
body form to an adult body form
Metamorphosis
In organisms with an open circulatory system, blood empties into the ??? where
it bathes the internal organs directly.
hemocoel
Animals lack a cell wall- True or False?
True
One trend in the evolution of animals is the increase in the number of tissue
(germ) layers during embryonic development. Flatworms and more complex
animals have ________ layers.
3
Most animal phyla are radially symmetrical. True or False?
False
All animals with tissues have what?
Symmetrical bodies
