Phylum Hemichordata

Q. An important characteristic that Hemichordates share with Chordates is:

1. pharynx with gill slits.
2. the absence of notochord.
3. pharynx without gill slits.
4. ventral tubular nerve cord.

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. Read the following statements and select the incorrect ones.
(i) Circulatory system in arthropods is of closed type.
(ii) Parapodia in annelids help in swimming.
(iii) Phylum Mollusca is the second largest animal phylum.
(iv) Aschelminthes are dioecious.

1. (i) and (iii) only
2. (i) only
3. (iii) only
4. (iii) and (iv) only

Q.

Balanoglossus is a

1. Chordate

2. Vertebrate

3. Non chordate

4. Protozoa

Q. In vertebrates the notochord:

1. Persists throughout the life
2. Is partially replaced by vertebral column
3. Is completely replaced by vertebral column
4. Is partially or fully replaced by vertebral column

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.

Select the characteristics shared by hemichordates and chordates.

1. Ventral tubular nerve cord
2. Pharynx with gill slits
3. Pharynx without gill slits
4. Absolute absence of notochord

Q.

Are Earthworms Ammonotelic?

Q. Hemichordates have now been placed with the non-chordates, close to echinoderms, because

1. they lack notochord
2. they lack pharyngeal gill-slits
3. they lack dorsal nerve cord
4. they lack heart and blood vessels

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.

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

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

3. None of these

4. Acorn worm --- Hemichordata --- Tornaria

Q. Identify the animal shown in the image.

1. Aplysia
2. Balanoglossus
3. Dentalium
4. Chiton

Q.

What is the respiratory organ of Hemichordata?

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 assertion A and reason R are correct

2. Assertion is correct and Reason is wrong.

3. Assertion is wrong and Reason is correct.

4. Both assertion A and reason R are wrong

Q. Which of the following statements are true for phylum Chordata?
a. In cephalochordates, notochord extends from head to tail and it is present throughout their life
b. All vertebrates are chordates but all chordates are not vertebrates
c. Central neural system is dorsal and solid
d. Chordates are divided into two subphyla, Agnatha and Gnathostomata

1. a and b
2. b and c
3. c and d
4. a and c

Q. Which of the following is/are not (a) characteristic feature(s) of Phylum Hemichordata?

1. Respiration through gills
2. Closed circulatory system
3. Bilateral symmetry
4. Notochord

Q.

The animals belonging to hemichordata are exclusively ______.

1. Arial

2. Aquatic and Marine

3. Terrestrial

4. Amphibian

Q.

Sacculus Rotundus is a dilated part as posterior end of

1. Colon

2. Ileum

3. Ilium

4. esophagus

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. Which among the following is a chordate?

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

Q. Which phylum of animals were earlier placed under chordates but now are considered as non-chordates?

1. Urochordates
2. Cephalochordates
3. Hemichordates
4. Protochordate

Q. Which of the following statements are true for the phylum Chordata?

(a) In cephalochordates, notochord extends from head to tail
(b) Urochordates are exclusively marine
(c) Notochord is dorsal to nerve cord
(d) All vertebrates are jawed

1. (a) and (b)
2. (b) and (c)
3. (c) and (d)
4. (a) and (c)

Q. Which of the following was earlier considered as a subphylum under phylum chordata and now placed as a separate phylum under non-chordata?

1. Cephalochordata
2. Hemichordata
3. Urochordata
4. Vertebrata

Q.

Give an example for each of the following :

Urochordata

Q.

Select the characteristics shared by hemichordates and chordates.

1. Ventral tubular nerve cord
2. Pharynx with gill slits
3. Pharynx without gill slits
4. Absolute absence of notochord

Q. Saccoglossus resembles arthropods in all the features except_________

1. open type circulatory system
2. similar respiratory structures
3. inidrect development
4. similar exeretory organs

Q. Which among the following have an open circulatory system?

1. (i) and (iii)
2. (ii) and (iv)
3. (iii) and (iv)
4. (i) and (ii)

Q. Important characteristic that hemichordates share with chordates is

1. pharynx without gill slits
2. pharynx with gill slits
3. absence of notochord
4. ventral tubular nerve cord

Q.

Notochord is present is

1. Star fish

2. Earthworm

3. Pila

4. Shark

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