Question 1

A small shrew moving a given distance will bear a lesser energy cost per gram of body weight compared to the energy cost per gram of body weight in a horse moving the same distance.

Accepted Answer

Larger animals like horses are more energy-efficient on a per gram basis when moving compared to smaller animals like shrews, due to lower metabolic rates per unit of body mass and more efficient locomotion.

Question 2

Compared to flatworms,annelids are more flexible,larger,and have more space for internal organs.

Accepted Answer

Annelids are larger and more flexible than flatworms, and they have a coelom which allows for more space for internal organs.

Question 3

A very small animal will have a larger surface area to volume ratio compared to a larger animal with the same shape.

Accepted Answer

This is because surface area increases with the square of the radius (or length), while volume increases with the cube of the radius (or length). Therefore, as an animal gets larger, its volume increases faster than its surface area, resulting in a smaller surface area to volume ratio.

Question 4

Heart muscle is a type of nonstriated muscle.

Accepted Answer

Heart muscle, also known as cardiac muscle, is a type of striated muscle. It gets its striated appearance from the presence of sarcomeres, which are specialized structures found in striated muscle cells.

Question 5

The word 'Protostome' refers to "anus first".

Accepted Answer

The word 'Protostome' actually refers to the embryonic development pattern of certain animals where the initial opening in the embryo becomes the mouth, and the anus forms later. This is the opposite of 'Deuterostomes', where the initial opening becomes the anus, and the mouth forms later.

Question 6

As animals increase in size,the body surface (length)increases much more slowly than body volume,making it difficult for activities served from the body surface to provision the mass of cells within.

Accepted Answer

This statement is true. As animals increase in size, their body surface area increases at a slower rate than their body volume due to the square-cube law. This makes it difficult for the body surface (such as the lungs or digestive tract) to provide enough nutrients and oxygen for a larger mass of cells within the body.

Question 7

The simple animal cell,like the protozoan cell,is capable of an independent existence.

Accepted Answer

The answer of The simple animal cell,like the protozoan cell,is...

Question 8

Mesoderm lines the outer edge of the blastocoel in pseudocoelomate roundworms.

Accepted Answer

The answer of Mesoderm lines the outer edge of the...

Question 9

A large animal will have difficulty with respiration and digestion unless its body surface invaginates or it develops an internal transport system.
Multiple Choice Questions

Accepted Answer

This statement is true. A large animal's body surface area will not be able to efficiently exchange gases or absorb nutrients without either invaginations (such as lungs or a digestive system) or an internal transport system (such as a circulatory system).

Question 10

Embryos that display radial cleavage also display mosaic development.

Accepted Answer

Radial cleavage results in cells being positioned in a mosaic fashion, meaning that different cells within the embryo will have different developmental fates depending on their position. This is in contrast to spiral cleavage, which results in cells being less tightly positioned and having more flexibility in their developmental outcome.

Question 11

A coelom arising from pouches of the primitive gut or archeteron describes schizocoelous formation.

Accepted Answer

A coelom arising from pouches of the primitive gut or archenteron describes enterocoelous formation, not schizocoelous formation. Schizocoelous formation involves the splitting of the mesodermal mass to form the coelom.

Question 12

The Metazoa consists of all multicellular animals except Porifera.

Accepted Answer

The Metazoa includes all multicellular animals, including Porifera (sponges).

Question 13

Leeches are bilateral,flattened dorsoventrally and have reduced coeloms that do not serve as hydrostatic skeletons.What other traits are directly associated with this organism?
A)enterocoelomate body plan
B)absence of setae
C)cephalization
D)open vascular system

Accepted Answer

The answer of Leeches are bilateral,flattened dorsoventrally and have reduced...

Question 14

The simplest animals are at the cellular grade of organization.

Accepted Answer

The cellular grade of organization is characterized by unicellular organisms, which are the simplest animals. Therefore, the statement is true.

Question 15

Stratified squamous epithelium consists of two or more layers of cells and is found only in vertebrates.

Accepted Answer

Stratified squamous epithelium is indeed composed of two or more layers of cells, but it is not found only in vertebrates. It is also found in invertebrates such as insects and mollusks.

Question 16

Radial symmetry may be found in jellyfish and sea anemones while secondary radial symmetry may be found in echinoderms.

Accepted Answer

This is a true statement. Jellyfish and sea anemones have radial symmetry, meaning their body parts are arranged in a circular pattern around a central axis. Echinoderms, such as starfish and sea urchins, have secondary radial symmetry, meaning they have a five-pointed symmetry.

Question 17

The vast majority of animal phyla are bilaterally symmetrical with three embryonic germ layers.

Accepted Answer

This statement is true. Bilateral symmetry and three embryonic germ layers are characteristics shared by the majority of animal phyla.

Question 18

A coelom in a segmented worm also serves as a hydrostatic skeleton.

Accepted Answer

The coelom in segmented worms (such as earthworms) is filled with fluid and acts as a hydrostatic skeleton, which helps to maintain the worm's shape and aids in movement. This is known as a "hydroskeleton."

Question 19

Both bilateral symmetry and radial symmetry are strongly associated with cephalization.

Accepted Answer

Bilateral symmetry is strongly associated with cephalization, as it often involves the development of a head region where sensory organs and nerve tissues are concentrated. Radial symmetry, on the other hand, does not typically involve cephalization, as organisms with this type of symmetry usually have their sensory organs distributed around their body rather than concentrated in a head region.

Question 20

Connective tissue,such as blood,consists of red and white blood cells and watery ground substance.

Accepted Answer

Connective tissue such as blood contains red and white blood cells as well as a watery ground substance called plasma.

Quiz 3: Animal Architecture