Q: Which type of circulatory system is present in \$Balanoglossus\$?

\$Balanoglossus\$ is a worm-like marine animal that belongs to phylum Hemichordata with an organ-system level of organization. The circulatory system in \$Balanoglossus\$ is of open type. It consists of a dorsal heart, few vessels, and sinuses. From the sinuses, the blood is distributed to the body parts and supplied with oxygen and nutrients. So, the correct answer is option A.

Question 1

The number of gills present in Osteichthyes is

Accepted Answer

Osteichthyes are the bony fishes that breathe through gills. There are four pairs of gill slits protected by an operculum which is a lateral flap of skin.Thus, the correct answer is option D.

Question 2

Renal portal system is absent in:

Accepted Answer

The renal portal system is derived from the posterior cardinal veins found in fishes, amphibians, and reptiles.It is absent in hagfish, lampreys, and mammals.Blood from the posterior part of the body flows into the renal portal veins, which pass into the caudal vena cava. Thus, the correct answer is option D.

Question 3

Which of the following is a Hemichordate?

Accepted Answer

Balanoglossus belongs to Hemichordata. It is considered as a separate phylum. So, the correct answer is option C.

Question 4

The common name of Necturus is

Accepted Answer

The commonly known mud puppy is a species of salamander which belongs to the genus Necturus. They live an entirely aquatic lifestyle. It is an endemic genus in eastern United State and Canada. They have flat square head and external gills.Thus, the correct answer is option D.

Question 5

Which of the following are amniotes?

Accepted Answer

The presence of a fluid-filled sac (amnion) around the embryo during its development is a key feature of amniotes.  Amniotes include three groups, namely Reptilia, Aves, and Mammalia.Amniotic eggs are an adaptation to the evolution of terrestrial organisms and serve as a source of moisture and shock absorber. Chondrichthyes (cartilaginous fishes), Osteichthyes (bony fishes), and amphibians lay eggs in water and have anamniotic eggs. So, the correct answer is option D.

Question 6

The lamprey (Petromyzon) is included in the same category of:

Accepted Answer

Petromyzon (Lamprey) and Myxine (Hagfish) both belong to the class Cyclostomata.Cyclostomes are jawless vertebrates. They are characterized by having an elongated eel-like body, circular mouth, slimy skin and are scaleless. So, the correct answer is B

Question 7

In which of the following notochord is absent?

Accepted Answer

Herdmania is an urochordate animal. In Urochordata, the notochord is present only in the larval tail. Balanoglossus is a hemichordate animal. Hemichordata is placed as a separate phylum. They share several chordate features, including a rudimentary notochord-like structure, the stomochord.This stomochord is like a flexible, hollow tube found in the body part of the buccal diverticulum.Both animals lack notochord in the adult stage.So, the correct answer is option A.

Question 8

Which type of circulatory system is present in $Balanoglossus$?

Accepted Answer

$Balanoglossus$ is a worm-like marine animal that belongs to phylum Hemichordata with an organ-system level of organization. The circulatory system in $Balanoglossus$ is of open type. It consists of a dorsal heart, few vessels, and sinuses. From the sinuses, the blood is distributed to the body parts and supplied with oxygen and nutrients. So, the correct answer is option A.

Question 9

Which of the following show relationship between the members of phylum Echinodermata and Chordata?

Accepted Answer

Balanoglossus is a marine worm belonging to phylum Hemichordata. Hemichordata was earlier considered as a subphylum under phylum Chordata. But now it is placed as a separate phylum.They share characteristics with both echinoderms and chordates. Their adult morphology resembles that of a chordate, while many traits in their larva resemble echinoderms.Archaeopteryx is a fossil bird showing both reptile and bird characters.Peripatus is an invertebrate and connecting link between the Annelida, or segmented worms, and the Arthropoda.Asterias (Starfish) belong to the phylum Echinodermata.So, the correct answer is option A.

Question 10

The study of reptiles is known as

Accepted Answer

Serpentology is the study of snakes.Herpetology is the study of amphibians and reptiles.Ichthyology deals with the study of fishes.Ornithology is the study of birds.Thus, the answer correct answer is option B.

Animal Kingdom

Biology
12528 Views

The number of gills present in Osteichthyes is

Renal portal system is absent in:

Which of the following is a Hemichordate?

The common name of Necturus is

Which of the following are amniotes?

The lamprey (Petromyzon) is included in the same category of:

In which of the following notochord is absent?

Which type of circulatory system is present in $B a l a n o g l o s s u s$ ?

Which of the following show relationship between the members of phylum Echinodermata and Chordata?

The study of reptiles is known as

Animal Kingdom

Biology 12528 Views

The number of gills present in Osteichthyes is

Renal portal system is absent in:

Which of the following is a Hemichordate?

The common name of Necturus is

Which of the following are amniotes?

The lamprey (Petromyzon) is included in the same category of:

In which of the following notochord is absent?

Which type of circulatory system is present in Balanoglossus?

Which of the following show relationship between the members of phylum Echinodermata and Chordata?

The study of reptiles is known as

Biology
12528 Views

Which type of circulatory system is present in $B a l a n o g l o s s u s$ ?