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

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 2

Petromyzon is a member of which of the following classes?

Accepted Answer

Petromyzon is a vertebrate that belongs to the class Cyclostomata. It is also known as lamprey and it is an ectoparasite on other vertebrates. Cyclostomes are jawless vertebrates. They are characterized by having an elongated body and a circular mouth without jaws.  So, the correct answer is option A.

Question 3

Which one of the following is not a characteristic feature of the subphylum Vertebrate?

Accepted Answer

The sub-phylum Vertebrata contains all the animals which have the backbone, gills or the central nervous system in any phase of development. There is a dorsal and hollow nerve cord which runs along the length of the animal. These organisms have a muscular heart present on the ventral side. The notochord in these organisms has been replaced by the mobile nervous tissue elements called the spinal cord. The group includes reptiles, fishes, amphibians and other animals. They have kidneys and lateral appendages in the form of fins or limbs.So, the correct answer is option C.

Question 4

Crocodiles and penguins are similar to whales and dogfish in which one of the following features?

Accepted Answer

A dorsal hollow nerve cord, notochord, paired pharyngeal gill slits, and post-anal tail are the four fundamental features shown by all chordates. Crocodiles, dogfish, whales, and penguins all belong to the phylum Chordata.The nervous system in chordates is hollow.Mammals, including aquatic ones like whales, don't lay an egg.Dogfish belong to cartilaginous fishes in which the endoskeleton is made of cartilage.They possess pharyngeal gill slits during the embryonic developmental stage, if not in the adult stage.Thus, the correct answer is option D.

Question 5

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 6

Which of the following features are common to Amphioxus, frog, sea horse and crocodile?

Accepted Answer

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Question 7

In coelomates, the problem of diffusion of food from gut to tissues is solved by:

Accepted Answer

Coelomates show the development of a circulatory system for the purpose of absorption of nutrients and its circulation throughout the body. An important component of the circulatory system is a pigment containing fluid component called blood. Blood is the liquid connective tissue that circulates in the entire body and serves various functions like carrying oxygen and carbon dioxide, hormones, nutrients, excretory substances etc.Hence, the correct answer is option C.

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
7129 Views

Renal portal system is absent in:

Petromyzon is a member of which of the following classes?

Which one of the following is not a characteristic feature of the subphylum Vertebrate?

Crocodiles and penguins are similar to whales and dogfish in which one of the following features?

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

Which of the following features are common to Amphioxus, frog, sea horse and crocodile?

In coelomates, the problem of diffusion of food from gut to tissues is solved by:

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 7129 Views

Renal portal system is absent in:

Petromyzon is a member of which of the following classes?

Which one of the following is not a characteristic feature of the subphylum Vertebrate?

Crocodiles and penguins are similar to whales and dogfish in which one of the following features?

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

Which of the following features are common to Amphioxus, frog, sea horse and crocodile?

In coelomates, the problem of diffusion of food from gut to tissues is solved by:

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
7129 Views

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