In which of the following classes of vertebrates there are groups of animals without limbs?

• Fish, reptiles and mammals

• Reptiles only

• Reptiles and amphibians  

• Amphibians only

The schematic section given below of an animal indicates that the animal is:

• Triploblastic, coelomic, invertebrate    

• Triploblastic, acoelomic, invertebrate

• Diploblastic, coelomic, invertebrate

• Triploblastic, coelomic, vertebrate

33.

Cladistic classification is based on

• sequential order in which branches arise from a phylogenetic tree

• the order of sequence divergence

• morphological features and skeleton of individuals

• cellular organization and cytoskeleton

Tautonym is an informal taxonomic designation used for animals referring to

• same name for genus and species

• same name for species and subspecies

• trinomial nomenclature

• the name of the author for the species

A marine biologist dug up a small animal from the ocean floor. The animal was uniformly segmented with short, stiff appendages and soft, flexible skin. It had a complete digestive system and an open circulatory system but no exoskeleton. Based on this description, the animal appears to be a

• lancelet

• roundworm

• mollusc

• crustacean

Which of these programs is used to conserve a species facing extinction?

• Captive breeding

• Natural resources

• Sustainable use 

• Edge effects

The following table gives vascular tissue characteristics of four divisions of Tracheophyta.

Divisions	Vascular tissue characteristics
A. Psilophyta	i. Well-developed tracheid and pits in lateral wall
B. Lycopodiophyta	ii. Tracheids
C. Sphenophyta	iii. Tracheids, vessels and well-developed phloem
D. Pteridophyta	iv. Primitive tracheids and pits in lateral wall

Identify the correct combinations.

• A - i; B- ii; C - iii; D - iv

• A - ii; B - i; C - iv; D - iii

• A - iv; B - iii; C - ii; D - i

• A - iii; B - iv; C - i; D - ii

As per the International Code of Botanical Nomenclature, 2006 (Vienna Code), which of the following is a Nothospecies?

• Polypodium vulgare subsp. prionodes (Asch.) Roth.

• Polypagon monspeliensis (L). Desf.

• Agrostis stolonifera L.

• Agrostis stolonifera L. × Polypogon monspeliensis (L.) Desf.

Which of the following groups have only two wings?

• Honey bee, beetle, ant

• Butterfly, housefly, fruitfly

• Dragonfly, butterfly, fruitfly

• Housefly, fruitfly, mosquito

Various types of excitability tissues when stimulated showed response as shown in the above figures. Which one of them is an example of fast adapting tissue?

• A

• B

• C

• D