Porifera And Coelenterata Test

1.

What is the function of jelly-like cells in organisms classified in the Phylum Porifera?

2.

What is the function of spikes in organisms classified in the Phylum Porifera?

3.

What is the function of pores in organisms classified in the Phylum Porifera?

4.

What is the process of reproduction for organisms classified in the Phylum Porifera?

5.

About how many species are there in the Phylum Porifera?

Explanation
There are approximately 5,000 species in the Phylum Porifera.

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6.

Organisms classified in the Phylum Porifera evolved about how many million years ago?

Explanation
Organisms classified in the Phylum Porifera evolved about 700 million years ago.

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7.

The word "porifera" means what?

Explanation
The word "porifera" is derived from Latin roots, where "por" means pore and "fera" means bearing. Therefore, "porifera" means "pore bearing" or "bearing pores". The term is used to describe a phylum of animals that includes sponges, which have numerous pores on their bodies for water circulation and feeding.

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8.

Organisms classified in the Phylum Porifera are complex.

A.

True
B.

False

Correct Answer
B. False

Explanation
Poriferans are the most primitive (simplest) animals on the planet.

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9.

Organisms classified in the Phylum Porifera have good regeneration.

A.

True
B.

False

Correct Answer
A. True

Explanation
Regeneration is the ability to grow back a lost part

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10.

There are three types of porifera cell types. List them with capitilized letters and semicolons between in order of outside cells, inside cells, and specialized cells.

Correct Answer
Pinacocytes; Choanocytes; Amoebocytes

Explanation
The three types of cell types in porifera are pinacocytes, choanocytes, and amoebocytes. Pinacocytes are the outermost cells that form a protective layer on the surface of the sponge. Choanocytes are found inside the sponge and have a collar-like structure that helps in generating water currents and capturing food particles. Amoebocytes are specialized cells that are responsible for various functions such as digestion, transportation of nutrients, and production of skeletal elements.

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11.

Specialized Porifera cells can either... (no caps with comma between words and add "or" before last word)

Correct Answer
store food, produce gametes, or produce spicules
store food, produce spicules, or produce gametes
produce gametes, store food, or produce spicules
produce gametes, produce spicules, or store food
produce spicules, store food, or produce gametes
produce spicules, produce gametes, or store food

12.

Spicules are like...

Correct Answer
bones for sponges
Bones for sponges

Explanation
Spicules are needle-like structures made of calcium carbonate or silica that provide structural support to sponges, similar to how bones provide support to the human body. These spicules help maintain the shape and rigidity of the sponge's body, allowing it to withstand water currents and predators. Therefore, comparing spicules to bones is an accurate analogy to understand their function in sponges.

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13.

Porifera classes are grouped by

Correct Answer
what the spicule is made of
What the spicule is made of
what the spicule is made out of
What the spicule is made out of

Explanation
The correct answer for this question is that Porifera classes are grouped by what the spicule is made of. Spicules are tiny, needle-like structures found in the body of sponges, and they can be made of different materials such as calcium carbonate or silica. The composition of the spicule is used as a characteristic feature to classify and group different classes of Porifera.

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14.

There are three Porifera classes. Name them in alphabetical order with a capitilized first letter for every word and semicolon between. Name in parentheses what it is made out of and an example of it. Ex: (not real) If Lopinia was a class and organisms in that class were made out of Co3O2 otherwise known as burgers and an example of Lopinia was a cheeseburger, I would write: Lopinia (Co302 - burgers) cheeseburger Note: if there is no scientific name for it don't say it

Correct Answer
Calcarea (CaCO3 - Lime) Leucosolenia; Hexactinellida (Silicon - Glass) Eupectela; Demospongiae (Spongin) Calcaria

Explanation
The three classes of Porifera, listed in alphabetical order, are Calcarea, Demospongiae, and Hexactinellida. Calcarea is made out of CaCO3, also known as Lime, and an example of this class is Leucosolenia. Hexactinellida is made out of Silicon, which forms Glass, and an example of this class is Eupectela. Demospongiae is made out of a substance called Spongin, and an example of this class is Calcaria.

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15.

What is the chemical formula for calcium carbonate?

Correct Answer
CaCO3

Explanation
The chemical formula for calcium carbonate is CaCO3. Calcium carbonate is a compound made up of one calcium atom (Ca) and three carbonate ions (CO3). It is commonly found in nature as limestone, chalk, or marble. Calcium carbonate is widely used in various industries, including construction, agriculture, and healthcare.

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16.

Organisms classified in the Phylum Porifera are... (think habitat then state in parenthases where they are mostly found then where they are also found; no caps)

Correct Answer
aquatic (marine and freshwater)

Explanation
Organisms classified in the Phylum Porifera are aquatic, meaning they live in water. They can be found in both marine environments, such as oceans and seas, as well as freshwater environments, including lakes and rivers.

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17.

The Phylum Coelenerata is also called...

Correct Answer
Cnidaria

Explanation
The correct answer is Cnidaria. The phylum Coelenterata is an outdated term that is no longer used in modern classification systems. However, it was previously used to refer to the phylum Cnidaria, which includes animals like jellyfish, corals, and sea anemones. Cnidaria is characterized by the presence of specialized cells called cnidocytes, which contain stinging structures called nematocysts. These animals have radial symmetry and a simple body plan, with a central cavity called the coelenteron.

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18.

Organisms classified in the Phylum Porifera have no... (three things; no caps)

Correct Answer
tissues, organs, and distinct body design
tissues, organs, or distinct body design
tissues; organs; distinct body design
tissues, organs, distinct body design

Explanation
Organisms classified in the Phylum Porifera have no tissues, organs, or distinct body design. Porifera, also known as sponges, are the simplest multicellular animals and lack specialized tissues and organs. They have a simple body structure with specialized cells that perform different functions but do not form true tissues. They also lack distinct body design or symmetry, unlike other higher animal groups.

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19.

Organisms classified in the Phylum Porifera...

A.

Are asymmetrical
B.

Have bilateral symmetry
C.

Have radial symmetry

Correct Answer
A. Are asymmetrical

Explanation
Organisms classified in the Phylum Porifera are asymmetrical. This means that their bodies do not have any definite shape or symmetry. Porifera, commonly known as sponges, have a simple body structure with numerous pores and canals. They lack any specialized tissues or organs, and their body shape can vary greatly. This lack of symmetry allows them to filter and circulate water efficiently through their bodies, enabling them to obtain nutrients and oxygen.

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20.

Organisms classified in the Phylum Porifera are always sessile. (sessile=do not move)

A.

True
B.

False

Correct Answer
B. False

Explanation
They are sessile most of the time as some are motile, meaning they do move.

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21.

The word Coelenterata or Cnidaria means a...

Correct Answer
hollow gut
Hollow gut

Explanation
The term "Coelenterata" or "Cnidaria" refers to a group of animals that have a hollow gut. This means that their digestive system consists of a central cavity that acts as both a mouth and an anus. The hollow gut allows for the efficient digestion and absorption of nutrients.

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22.

There are about ___________ species of Coelenterata.

Correct Answer
9,000
9000
nine-thousand
Nine-thousand
Nine thousand
nine thousand

Explanation
Coelenterata is a phylum that includes various species of animals such as jellyfish, sea anemones, and coral. The question is asking for the number of species in this phylum. The correct answer is "9,000" or "9000" which represents the approximate number of species within the Coelenterata phylum.

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