A body cavity is a fluid-filled space between the gut and the outer wall of an animal. The body cavities that are not lined by peritonium, that is a thin cellular membrane derived from mesoderm. Embryologically a pseudocoel may be a persistent blastocoel or possibly derived from the vacuoles within the cells. Pseudocoel functions in much the same way as a coelom and occurs in Nemathelminthes and several other phyla.

Define pseudocoelom

EASY

Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms.>Structure and Function - Multicellular organisms have a hierarchical structural organization, in which any one system is made up of numerous parts and is itself a component of the next level

Part of epidermis that keeps out unwanted particles is called:

EASY

Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms.>Structure and Function - Multicellular organisms have a hierarchical structural organization, in which any one system is made up of numerous parts and is itself a component of the next level

Which of the following statements is true about glandular epithelium in the salivary gland?

MEDIUM

Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms.>Structure and Function - Multicellular organisms have a hierarchical structural organization, in which any one system is made up of numerous parts and is itself a component of the next level

A person has 400 million alveoli per lung with an average radius of 0.1 mm for each alveolus. Considering the alveoli are spherical in shape, the total respiratory surface of that person is closest to

MEDIUM

Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms.>Structure and Function - Multicellular organisms have a hierarchical structural organization, in which any one system is made up of numerous parts and is itself a component of the next level

Select the option which is not correct with respect to enzyme action:

EASY

Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms.>Structure and Function - Multicellular organisms have a hierarchical structural organization, in which any one system is made up of numerous parts and is itself a component of the next level

Which of the following is not a function of the skeletal system?

MEDIUM

Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms.>Structure and Function - Multicellular organisms have a hierarchical structural organization, in which any one system is made up of numerous parts and is itself a component of the next level

Choose the correctly matched pair:

HARD

Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms.>Structure and Function - Multicellular organisms have a hierarchical structural organization, in which any one system is made up of numerous parts and is itself a component of the next level

Given below are the four schematics that describe the dependence of the rate of an enzymatic reaction on temperature. Which of the following combination is true for thermophilic and psychrophilic organisms?

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EASY

Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms.>Structure and Function - Multicellular organisms have a hierarchical structural organization, in which any one system is made up of numerous parts and is itself a component of the next level

Study the following statements and identify the incorrect one

EASY

Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms.>Structure and Function - Multicellular organisms have a hierarchical structural organization, in which any one system is made up of numerous parts and is itself a component of the next level

The function of the gap junction is to:

MEDIUM

Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms.>Structure and Function - Multicellular organisms have a hierarchical structural organization, in which any one system is made up of numerous parts and is itself a component of the next level

Which of the following describes the given graph

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EASY

Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms.>Structure and Function - Multicellular organisms have a hierarchical structural organization, in which any one system is made up of numerous parts and is itself a component of the next level

Select the incorrectly matched pair from following:

HARD

Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms.>Structure and Function - Multicellular organisms have a hierarchical structural organization, in which any one system is made up of numerous parts and is itself a component of the next level

It is much easier for a small animal to run uphill than for a large animal, because:

EASY

Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms.>Structure and Function - Multicellular organisms have a hierarchical structural organization, in which any one system is made up of numerous parts and is itself a component of the next level

Statement I : Tendons attach one bone with another bone.
Statement II : Epiglottis is formed by elastic cartilage.

The correct option among the following is

EASY

Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms.>Structure and Function - Multicellular organisms have a hierarchical structural organization, in which any one system is made up of numerous parts and is itself a component of the next level

The ciliated epithelial cells are required to move particles or mucus in a specific direction. In humans, these cells are mainly present in:

MEDIUM

Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms.>Structure and Function - Multicellular organisms have a hierarchical structural organization, in which any one system is made up of numerous parts and is itself a component of the next level

The graph below depicts the velocity of an enzyme-catalyzed reaction vs. substrate concentration. Identify the alphabets with the correct descriptions.

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I. $A =$ Enzyme activity

II. $B =$ Substrate concentration at maximum velocity

III. $A =$ Substrate concentration at which half of the maximum velocity

IV. $B =$ Half of the maximum velocity

MEDIUM

Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms.>Structure and Function - Multicellular organisms have a hierarchical structural organization, in which any one system is made up of numerous parts and is itself a component of the next level

Study the following statements
$A)$ Compound epithelium forms the lining of the larger pancreatic ducts as stratified cuboidal epithelium
$B)$ Cartilage is a vascular tissue surrounded by fibrous connective tissue sheath called perichondrium
$C)$ Gap junctions in cardiac muscles permit electrical impulses to be conducted rapidly
$D)$ Myelinated nerve fibres are found in grey matter of the central nervous system