Which of the following features is not present in Periplaneta americana?

Which of the following structures is homologous to the wing of a bird?

Which of the following characteristic features always holds true for the corresponding group of animals?

Which one of the following characteristics is not shared by birds and mammals?

Which of the following features is not present in the Phylum-Arthropoda?

Which among these is the correct combination of aquatic mammals?

In case of Poriferans, the spongocoel is lined with flagellated cells called

Identify the vertebrate group of animals characterized by crop and gizzard in its digestive system.

Which one of these animals is not a homeotherm?

Which of the following animals does not undergo metamorphosis?

Which of the following terms describe human dentition?

Consider the following features: $\newline$(a) Organ system level of organisation $\newline$(b) Bilateral symmetry $\newline$(c) True coelomates with segmentation of body $\newline$Select the correct option of animal groups which possess all the above characteristics.

Goblet cells of the alimentary canal are modified from:

Match the following columns and select the correct option.

Bilaterally symmetrical and acoelomate animals are exemplified by:

Which of the following statements are true for the phylum-Chordata?

Match List - I with List - II.

Which one of the following organisms bears hollow and pneumatic long bones?

Match the following:

Following are the statements about prostomium of earthworm. $,\newline$(a) It serves as a covering for mouth. $\newline$(b) It helps to open cracks in the soil into which it can crawl. $\newline$(c) It is one of the sensory structures. $\newline$(d) It is the first body segment. $\newline$Choose the correct answer from the options given below.

$\newline$Given below are two statements: $\newline$ $\newline$Assertion (A): All vertebrates are chordates but all chordates are not vertebrates. $\newline$Reason (R): Notochord is replaced by the vertebral column in adult vertebrates. $\newline$ $\newline$In the light of the above statements, choose the most appropriate answer from the options given below:

Radial symmetry is NOT found in adults of phylum ___________

Once the undigested and unabsorbed substances enter the caecum, their backflow is prevented by:

Match List I with List II:

The unique mammalian characteristics are:

Match List I with List II:

Select the correct statements with reference to chordates: $\newline$A. Presence of a mid-dorsal, solid and double nerve cord. $\newline$B. Presence of a closed circulatory system. $\newline$C. Presence of paired pharyngeal gill slits. $\newline$D. Presence of a dorsal heart. $\newline$E. Triploblastic pseudocoelomate animals. $\newline$Choose the correct answer from the options given below:$$

$\newline$Consider the following statements: $\newline$ $\newline$A. Annelids are true coelomates $\newline$B. Poriferans are pseudocoelomates $\newline$C. Aschelminthes are acoelomates $\newline$D. Platyhelminthes are pseudocoelomates $\newline$ $\newline$Choose the correct answer from the options given below:

$\newline$The following are the statements about non-chordates: $\newline$ $\newline$A. Pharynx is perforated by gill slits. $\newline$B. Notochord is absent. $\newline$C. Central nervous system is dorsal. $\newline$D. Heart is dorsal if present. $\newline$E. Post anal tail is absent. $\newline$ $\newline$Choose the most appropriate answer from the options given below: