Animal Kingdom

Question 1

Given below are two statements: In the light of the above statements, choose the most appropriate answer from the options given below: Statement I: When any plane passing through the central axis of the body divides the organism into two identical halves, it is called radial symmetry. Statement II: In phylum Echinodermata, both adults and larvae are radially symmetrical.

Accepted Answer

Statement I is correct but Statement II is incorrect. Statement I is the standard definition of radial symmetry. Statement II fails on the larvae: adult echinoderms are radially symmetrical, but their larvae are BILATERALLY symmetrical, which is why the group is placed close to the chordates despite the adult form.

Answer

Both Statement I and Statement II are correct

Answer

Both Statement I and Statement II are incorrect

Answer

Statement I is incorrect but Statement II is correct

Question 2

Given below are two statements: In the light of the above statements, choose the most appropriate answer from the options given below: Statement I: The class name Reptilia refers to creeping or crawling mode of locomotion. Statement II: All organisms belonging to Reptilia have three chambered heart.

Accepted Answer

Statement I is correct but Statement II is incorrect. Reptilia does come from the Latin for creeping, so Statement I holds. Statement II fails on the word ALL — the reptilian heart is usually three-chambered, but crocodiles have a four-chambered heart.

Answer

Both Statement I and Statement II are correct

Answer

Both Statement I and Statement II are incorrect

Answer

Statement I is incorrect but Statement II is correct

Question 3

Which of the following is not a characteristic of chordates?

Accepted Answer

Absence of gills. Chordates are defined by a notochord, a dorsal hollow nerve cord, a post-anal tail and a pharynx perforated by GILL SLITS, at some stage of life. So the absence of gills is the opposite of a chordate feature — gill slits are what non-chordates lack.

Answer

Presence of notochord

Answer

Central nervous system is dorsal

Answer

Presence of post anal part (tail)

Q1.Given below are two statements: In the light of the above statements, choose the most appropriate answer from the options given below:

Q2.Given below are two statements: In the light of the above statements, choose the most appropriate answer from the options given below:

Q3.Which of the following is not a characteristic of chordates?