Q. No.Which one of the following living organisms completely lacks a cell wall?
(1) Cyanobacteria
(2) Sea-fan (Gorgonia)
(3) Saccharomyces
(4) Blue-green algae
Planaria posses high capacity of
(1) metamorphosis
(2) regeneration
(3) alternation of generation
(4) bioluminescence
A marine cartilaginous fish that can produce electric current is
(1) Pristis
(2) Torpedo
(3) Trygon
(4) Scoliodon
Infection of Ascaris usually occurs by
(1) drinking water containing egg of Ascaris
(2) eating imperfectly cooked pork
(3) tse-tse fly
(4) mosquito bite
In which one of the following, the genus name, its two characters and its phylum are not correctly matched, whereas the remining three are correct?
| Genus Name | Two characters | Phylum |
| 1. Pila | (i) Body segmented (ii) Mouth with Radula |
Mollusca |
| 2. Asterias | (i) Spiny skinned (ii) Water vascular system |
Echinodermata |
| 3. Sycon | (i) Pore bearing (ii) Canal system |
Porifera |
| 4. Periplaneta | (i) Jointed appendages (ii) Chitinous exoskeleton |
Arthropoda |
What will you look to identify the sex of the following?
| 1. | Male frog – a copulatory pad on the first digit of the hind limb |
| 2. | Female cockroach – anal cerci |
| 3. | Male shark – claspers bone on pelvic fins |
| 4. | Female Ascaris – sharply curved posterior end |
In which one of the following, the genus name, its two characters and its class/phylum are correctly matched?
| Genus Name | Two characters | Class/Phylum | ||
| 1. | Salamandra | (i) | A tympanum represents ear | Amphibia |
| (ii) | Fertilization is external | |||
| 2. | Pteropus | (i) | Skin possesses hair | Mammalia |
| (ii) | oviparous | |||
| 3. | Aurelia | (i) | Cnidoblasts | Coelenterata |
| (ii) | Organ level of organization | |||
| 4. | Ascaris | (i) | Body segmented | Annelida |
| (ii) | Males and Females distinct |
One example of animals having a single opening to the outside that serves both as mouth as well as anus is
(1) Octopus
(2) Asterias
(3) Ascidia
(4) Fasciola
Which one of the following statements about all the four of Spongilla, leech, dolphin and penguin is correct?
| 1. | Penguin is homeothermic while the remaining three are poikilothermic |
| 2. | leech is a fresh water form while all others are marine |
| 3. | Spongilla has special collared cells called choanocytes, not found in the remaining three |
| 4. | All are bilaterally symmetrical |
Which one of the following kinds of animals are triploblastic?
(1) Flat worms
(2) Sponges
(3) Ctenophores
(4) Corals
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