Phylum Hemichordata

Q. Indirect development means

1. there is no larval stage during development
2. there is a larval stage during development
3. the embryo develops inside the body of the organism
4. the embryo develops in water

Q.

An important characteristic that Hemichordates share with Chordates is-

1. Absence of notochord

2. Ventral tubular nerve cord

3. Pharynx with gill slits

4. Pharynx without gill slits

Q.

Is hydra a coelomate or acoelomate?

Q.

Fill in the blanks with appropriate option :

The connecting link between invertebrates and chordates is the _____________ that belongs to the phylum _______________ and has a larval form called __________ which resembles the larval form of Echinodermata.

1. Acorn worm --- Hemichordata --- Tornaria

2. Acornis worm --- Hemichordata --- Tornaria.

3. Acorn worm --- Hemichordata --- Trochophore.

4. None of these

Q.

Differentiate between the following.

Sponges and echinoderms.

Q. The body of hemichordates is divided into

1. head, muscular foot and visceral hump
2. head, thorax and abdomen
3. proboscis, collar and trunk
4. proboscis and trunk

Q.

Balanoglossus is a

1. Chordate

2. Vertebrate

3. Non-chordate

4. Protozoan

Q. Which is associated with pearl formation?

1. Oslrea
2. Peclen
3. Nautilus
4. Pinctada

Q. Open type of circulatory system is found in

1. Annelida and Arthropoda
2. Mollusca and Annelida
3. Arthropoda and Hemichordata
4. Chordata and Hemichordata

Q. Which among the following is a chordate?

1. Snail
2. Starfish
3. Shark
4. Sea urchin

Q. Molluscan blood contains

1. Haemozoin
2. Haemoglobin
3. All of these
4. Haemocyanin

Q.

Fill in the blanks:

The connecting link between invertebrates and chordates is the (i)______ that belongs to the phylum (ii)_______ and has a larval form called (iii)_______ which resembles the larval form of (iv)_________.

1. (i) Asterias, (ii) Echinodermata, (iii) Tornaria, (iv) Hemichordata

2. (i) Acorn worm, (ii) Hemichordata, (iii) Trochophore, (iv) Echinodermata

3. (i) Acorn worm, (ii) Hemichordata, (iii) Tornaria, (iv) Echinodermata

4. (i) Asterias, (ii) Echinodermata, (iii) Bipinnaria, (iv) Hemichordata

Q. Among the following which one is not a deuterostome?

1. Sea Urchin
2. Sand Dollar
3. Earthworm
4. Ichthyophis.

Q.

Read the following statements and choose the correct option.

Statement 1 : In hemichordates, body is divided into proboscis, collar and trunk.
Statement 2 : The proboscis helps in digestion in hemichordates.

1. Both the statements are wrong

2. Both the statements are correct

3. Statement 1 is correct and statement 2 is wrong

4. Statement 1 is wrong and statement 2 is correct

Q. Which of the following is commonly called "Pearl Oyster"?

1. Limulus
2. Dentalium
3. Pinctada
4. Aurelia

Q. Giant Squid belongs to the genus

1. Loligo
2. Architeuthis
3. Octopus
4. Tethys

Q. Which of the following pairs of organisms and their characteristic features is wrongly paired?

1. Snail-annelida, invertebrata, muscular foot
2. Earthworm-annelida, invertebrata, setae
3. Butterfly-insecta, invertebrata, arthropoda
4. Paramecium-cilia, protozoa, lacks cell wall

Q. Visceral mass is segmented in

1. Aplysia
2. Xancus
3. Dentalium
4. Neopilina

Q. Visceral mass and a muscular foot is shown by animals belonging to

1. Medusoids
2. Mollusca
3. Aschelminthes
4. Annelida
5. Arthropoda

Q. Osphradium is organ of mollusc meant for :

1. Olfactory sense receptor
2. All of the above
3. Help in selection of food
4. Chemoreceptor

Q. Coelom of animals commonly known as tooth shells originates from

1. By enterocoelic method
2. By schizocoelic method and filled with coelomic fluid
3. By splitting of embryonic mesoderm and filled with blood
4. From blastocoel

Q.

Based on the location of the dorsal nerve cord, chordates are subdivided into ___________________ & ____________________ .

1. Vertebrata & Non Vertebrata

2. Vertebrates & Invertebrates

3. Protochordata & Vertebrata

4. Non chordates & Chordates

Q. Which one of the following phylum is correctly matched with its general characteristics?

1. Hemichordata – Body is composed of collar, proboscis and a long trunk. Sexes are separate. Development is direct.
2. Mollusca – Molluscs are monoecious, oviparous with indirect development.
3. Arthropoda – Segmented body. The body consists of the head, thorax and abdomen. Malpighian tubules help in excretion.
4. Echinodermata – Sexes are separate. Reproduction is sexual. Fertilization is usually internal.

Q.

give the examples of kingdom reptile and the characters of its examples

Q. Which is an example of a coelenterate?

1. Sea pen
2. Sea cucumber
3. Sea horse
4. Sea dollar