Chapter 4

Living organism differ in (a) Shape (b) Form (c) Size and habit (d) All of these

Which is not a character of sponges? (a) Multicellular (b) Cells are functionally independent (c) Cellular level of organization (d) Tissue level of organization

Which phylum shows tissue level of organization? (a) Protozoa (b) Porifera (c) Coelenterate (d) All of these

Organ system level of organization is not found in (a) Annelida (b) Arthropod (c) Molluscs (d) Platyhelminthes

Incomplete digestive tract (blind sac body plan) is found in (a) Annelida (b) Arthropod (c) Molluscs (d) Platyhelminthes

Closed type of circulatory system is present in (a) Annelida and arthropod (b) Arthropod and mollusc (c) Annelida and cephalopods (d) Mollusc and echinodermates

In open type of circulatory system (a) Blood flow in sinuses (b) Blood pressure is low and irregular (c) It is found in arthropods and molluscs (except cephalopods) (d) All are true

Closed type of circulatory system is found in (a) Annelida (b) Cephalopods (c) Vertebrate (d) All of these

What is false about closed circulatory system? (a) Blood pressure is high and regular (b) Amount of blood is limited (c) Blood circulates through arteries, veins and capillaries (d) Blood pressure is low and irregular

When the body of an animal can be divided into equal left and right halves by one plane symmetry. It is known as (a) Bilateral (b) Radial (c) Biradial (d) Asymmetric

Radial symmetry is shown by (a) Coelenterate (b) Platyhelminthes (c) Adult echinodermates (d) Both (a) and (c)

Most of the sponges are (a) Bilateral (b) Radial (c) Biradial (d) Asymmetric

The first diploblastic animal is (a) Coelenterates (b) Platyhelminthes (c) Aschelminthes (d) Annelida

The first triploblastic animal is (a) Coelenterates (b) Platyhelminthes (c) Aschelminthes (d) Annelida

Triploblastic animal contains (a) Ectoderm (b) Mesoderm (c) Endoderm (d) All of these

Aschelminthes are (a) Eucoelomate (b) Pseudocoelomate (c) Acoelomate (d) None of these

Which of the following is acoelomate? (a) Porifera (b) Coelenterates (c) Platyhelminthes (d) All of these

Metameric segmentation is found in (a) Annelida (b) Arthropod (c) Both (a) and (b) (d) Platyhelminthes

Notochord is derived from which layer? (a) Ectoderm (b) Mesoderm (c) Endoderm (d) All of these

Which of the following is correct about notochord? (a) Dorsally situated (b) Mesodermal in origin (c) Rod like (d) All of these

Radial symmetry is shown by (a) Ctenophores (b) Coelenterates (c) Adult echinodermates (d) All of these

The undifferentiated layer present between the ectoderm and endoderm in coelenterate is (a) Mesophyll (b) Gastral layer (c) Archenteron (d) Mesoglea

Which of the following is correct about metamerism (true segmentation)? (a) Every organ shows serial repetition. (b) The body is divided externally as well as internally (c) Each segment is not supplied with separate nerve and blood vessels. (d) All of these

In some animals, the body cavity is not lined by mesoderm. Instead the mesoderm is present as scattered pouches in between the ectoderm and endoderm. Such a body cavity is called (a) Eucoelom (b) Pseudocoelom (c) Acoelom (d) Any of the above

The following are coelomates except (true coelom) (a) Annelida (b) Platyhelminthes (c) Mollusca (d) Chordata

Select the total number of organism from the following which are sessile: Amoeba, Euglena, Adamsia, Spongilla, Hydra, Jelly fish, Earthworm (a) 1 (b) 2 (c) 3 (d) 4

Which of the following is incorrect about Porifera? (a) It is a solitary or colonial organism (b) Majority live in sea and some live in fresh water (c) Most of them are asymmetric (d) All of the above

Members of phylum Porifera are commonly known as (a) Flatworms (b) Roundworms (c) Sponges (d) Corals

Water path in sponges is (a) Ostia \(\rightarrow\) Spongocoel \(\rightarrow\) Osculum (b) Osculum \(\rightarrow\) Spongocoel \(\rightarrow\) Osculum (c) Ostia \(\rightarrow\) Spongocoel \(\rightarrow\) Ostia (d) Spongocoel \(\rightarrow\) Ostia \(\rightarrow\) Osculum

The unique character of sponges is (a) Choanocytes or collar cells line, the spongocoel and the canals. (b) That they are hermaphrodite. (c) That they live in marine water. (d) It reproduces by asexual means only.

The character possessed by all sponges are (a) That all are fresh water (b) All possess tissue level of organization (c) External fertilization (d) Hermaphrodite

Select the total number of statements belonging to sponges: (1) Cellular level of organization. (2) Body is supported by endoskeleton made up of spicules or sponging fibres. (3) Larva stage is morphologically different from adult. (4) Pathway of water transport is helpful in gathering of food, respiratory exchange and removal of waste. (5) Hermaphrodite organism. (6) They show the power of regeneration. (a) 5 (b) 6 (c) 4 (d) 3

Select the fresh water sponge from the following: (a) Sycon (b) Euspongia (c) Spongilla (d) Hyalonema

Another name of sycon is (a) Scypha (b) Euspongia (c) Spongilla (d) Hyalonema

Select the total number of marine sponges from the following: Leucosolenia, Euspongia, Spongilla, Sycon, Hyalonema (a) 3 (b) 4 (c) 5 (d) 2

The primitive multicellular animals having cellular level of organization are (a) Ctenophores (b) Sponges (c) Corals (d) Crustacean

Water enters through minute pores in the body wall into central cavity in sponges. These minute pores are known as (a) Osculum (b) Ostia (c) Spongocoel (d) Any of the above

In sponge, the sperm and ova are produced by the same individual. Such types of organisms are called (a) Asexual (b) Unisexual (c) Hermaphrodite (d) Dioecious

Canal system and choanocytes are characteristic of (a) Ctenophora (b) Coelenterates (c) Platyhelminthes (d) Porifera

In sponges, the commonly seen larva are (a) Amphiblastula (b) Parenchymula (c) Planula (d) Both (a) and (b)

Digestion in sponges is (a) Intracellular (b) Extracellular (c) Both (a) and (b) (d) None of these

Which of the following is correct about reproduction in sponges? (a) The mode of asexual reproduction such as gemmule formation, budding and fragmentation. (b) Fertilization is internal (c) Development is indirect (d) All of these

Exogenous budding is seen in case of (a) Scypha (b) Euspongia (c) Spongilla (d) Hyalonema

The following characters are related to phylum: (1) Aquatic, mostly marine (2) Sessile or free swimming (3) Radially symmetrical animals (4) They show polymorphism (a) Porifera (b) Ctenophora (c) Echinodermata (d) Coelenterata

Cnidoblast is a characteristic feature of (a) Porifera (b) Coelenterata (c) Ctenophora (d) Arthropoda

The first diploblastic animal showing tissue level of organization is (a) Sycon (b) Gorgonia (c) Taenia (d) Locust

Cnidoblast is used for (a) Anchorage (b) Defense (c) Capture of prey (d) All of these

Select the correct matching: (a) Petromyzon Hag fish (b) Echinus Brittle star (c) Apis Silkworm \(\begin{array}{ll}\text { (d) Pennatula } & \- & \text { Sea pen }\end{array}\)

Select incorrect matching: (a) Locusta Locust (b) Cucumaria Sea cucumber (c) Meandrina Sea anemone (d) Echinus Sea urchin

Some cnidarians examples corals have a skeleton composed of (a) Spongin fibres (b) Silica (c) Calcium carbonate (d) Any of these