BIO 182 - Lab Exam Questions And Verified
Detailed And Correct Answers| Often Tested|
Graded A+| Guaranteed Pass.
Another name for a fertilized egg is a - ANSWER ✔✔ Zygote
Name the cell division process (starts with the letter "m") in which the fertilized eggs develop
into a multicellular embryo - ANSWER ✔✔ Mitosis
The embryonic stage referred to as a hollow ball of cells is called the
_______________________ and its central cavity is the ____________________________ -
ANSWER ✔✔ Blastula - Blastacoel
Name the embryonic stage where cells are moving inward toward the central cavity
(invagination) forming the beginning of the primitive digestive system or archenteron (arch (G)
= primitive; enteron (G) = gut) - ANSWER ✔✔ Gastrulation
Stoma is (G) meaning mouth and deutero is (G) for 2nd. Therefore, deuterostomes are organisms
in which the 2nd embryonic opening becomes the _______________________ of the organism
and the 1st opening or blastopore becomes the _____________________ - ANSWER ✔✔
Mouth - Anus
Name the 2 major phyla that are deuterostomes: _______________________________ and
______________________ - ANSWER ✔✔ Phylum Echinodermata - Phylum Chrodata
Proto is (G) for first; therefore, in organisms that are protostomes the 1st opening becomes the
__________________. Arthropods, which make up 80% of all the animal species, are
protostomes - ANSWER ✔✔ Mouth
Ectoderm develops into the ________________________ and _____________________;
mesoderm develops into ____________________ and endoderm develops
into_______________________ - ANSWER ✔✔ Skin, nerves, muscle, digestive tube
Name the flagellated cell in phylum Porifera that propels water through the
body:______________ - ANSWER ✔✔ Choanocyte
Water in sponges circulates inward via pores into a cavity called the ______________ and exits
through the opening called the _______________________ - ANSWER ✔✔ Spongocoel
Name the cell in Porifera that produces spicules.________________________ - ANSWER ✔✔
sclerocytes
, Name the 3 kinds of spicules. ____________________, ___________________,
_________________ - ANSWER ✔✔ calcium carbonate, silica, spongin
An organism that can make both male and female gametes is known as a
__________________________ If no gametes are needed for reproduction the process is known
as __________________________________ - ANSWER ✔✔ Hermaphrodite - Asexual
reproduction
What are the "stinging cells" found mainly on tentacles in this phylum?
_____________________________ What are the organelles contained within these cells that are
released like a harpoon? ________________________________________ - ANSWER ✔✔
Cnidocytes - Nematodytes
Class _______________________ can have 2 body forms: a cylindrical form known as a
_____________________ and/or a free floating, swimming form that (functions in sexual
reproduction) is known as a _______________________ - ANSWER ✔✔ Hydrozoa - Polyp -
Medusa
Both polyps and medusa have a single opening into an incomplete digestive system known as the
_______________________________________ - ANSWER ✔✔ Gastrovascular Cavity
Having 2 layers cells (from ectoderm and endoderm only) is known as
_________________________________. Mesoderm is never developed in Cnidaria - ANSWER
✔✔ Diploblastic
Unlike the Phylums Porifera & Cnidaria, most platyhelminthes have the typical animal formation
of a distinct head known as ________________________________, the development of nervous
control and sense organs in the anterior end - ANSWER ✔✔ Cephalization
Flatworms have structures developed from all 3 germ layers making them known as
_______________________. However flatworms are _______________________ meaning
there is no fluid filled body cavity between ectoderm and endoderm structures - ANSWER ✔✔
Triploblastic - Acoelomate
The incomplete digestive tract is called the __________________________________________
(GVC). The single opening serves as both mouth and anus - ANSWER ✔✔ Gastrovascular
Cavity
Planaria belong to the Class ___________________________, which includes nonparasites also
known as ________________________________________ - ANSWER ✔✔ Turbellaria -
Flatworms
Class Trematoda includes parasites that look triangular, like the ends of an anchor or tail of
whales, and are called ______________________________ - ANSWER ✔✔ Flukes
Detailed And Correct Answers| Often Tested|
Graded A+| Guaranteed Pass.
Another name for a fertilized egg is a - ANSWER ✔✔ Zygote
Name the cell division process (starts with the letter "m") in which the fertilized eggs develop
into a multicellular embryo - ANSWER ✔✔ Mitosis
The embryonic stage referred to as a hollow ball of cells is called the
_______________________ and its central cavity is the ____________________________ -
ANSWER ✔✔ Blastula - Blastacoel
Name the embryonic stage where cells are moving inward toward the central cavity
(invagination) forming the beginning of the primitive digestive system or archenteron (arch (G)
= primitive; enteron (G) = gut) - ANSWER ✔✔ Gastrulation
Stoma is (G) meaning mouth and deutero is (G) for 2nd. Therefore, deuterostomes are organisms
in which the 2nd embryonic opening becomes the _______________________ of the organism
and the 1st opening or blastopore becomes the _____________________ - ANSWER ✔✔
Mouth - Anus
Name the 2 major phyla that are deuterostomes: _______________________________ and
______________________ - ANSWER ✔✔ Phylum Echinodermata - Phylum Chrodata
Proto is (G) for first; therefore, in organisms that are protostomes the 1st opening becomes the
__________________. Arthropods, which make up 80% of all the animal species, are
protostomes - ANSWER ✔✔ Mouth
Ectoderm develops into the ________________________ and _____________________;
mesoderm develops into ____________________ and endoderm develops
into_______________________ - ANSWER ✔✔ Skin, nerves, muscle, digestive tube
Name the flagellated cell in phylum Porifera that propels water through the
body:______________ - ANSWER ✔✔ Choanocyte
Water in sponges circulates inward via pores into a cavity called the ______________ and exits
through the opening called the _______________________ - ANSWER ✔✔ Spongocoel
Name the cell in Porifera that produces spicules.________________________ - ANSWER ✔✔
sclerocytes
, Name the 3 kinds of spicules. ____________________, ___________________,
_________________ - ANSWER ✔✔ calcium carbonate, silica, spongin
An organism that can make both male and female gametes is known as a
__________________________ If no gametes are needed for reproduction the process is known
as __________________________________ - ANSWER ✔✔ Hermaphrodite - Asexual
reproduction
What are the "stinging cells" found mainly on tentacles in this phylum?
_____________________________ What are the organelles contained within these cells that are
released like a harpoon? ________________________________________ - ANSWER ✔✔
Cnidocytes - Nematodytes
Class _______________________ can have 2 body forms: a cylindrical form known as a
_____________________ and/or a free floating, swimming form that (functions in sexual
reproduction) is known as a _______________________ - ANSWER ✔✔ Hydrozoa - Polyp -
Medusa
Both polyps and medusa have a single opening into an incomplete digestive system known as the
_______________________________________ - ANSWER ✔✔ Gastrovascular Cavity
Having 2 layers cells (from ectoderm and endoderm only) is known as
_________________________________. Mesoderm is never developed in Cnidaria - ANSWER
✔✔ Diploblastic
Unlike the Phylums Porifera & Cnidaria, most platyhelminthes have the typical animal formation
of a distinct head known as ________________________________, the development of nervous
control and sense organs in the anterior end - ANSWER ✔✔ Cephalization
Flatworms have structures developed from all 3 germ layers making them known as
_______________________. However flatworms are _______________________ meaning
there is no fluid filled body cavity between ectoderm and endoderm structures - ANSWER ✔✔
Triploblastic - Acoelomate
The incomplete digestive tract is called the __________________________________________
(GVC). The single opening serves as both mouth and anus - ANSWER ✔✔ Gastrovascular
Cavity
Planaria belong to the Class ___________________________, which includes nonparasites also
known as ________________________________________ - ANSWER ✔✔ Turbellaria -
Flatworms
Class Trematoda includes parasites that look triangular, like the ends of an anchor or tail of
whales, and are called ______________________________ - ANSWER ✔✔ Flukes
