15393.Consider the following four statements (a - d) about certain desert animals such as kangaroo rat.
(a) They have dark colour and high rate of reproduction and excrete solid urine
(b) They do not drink water, breathe at a slow rate to conserve water and have their body covered with thick hairs
(c) They feed on dry seeds and do not require drinking water
(d) They excrete very concentrated urine and do not use water to regulate body temperature.
Which two of the above statements for such animals are true?
(a) They have dark colour and high rate of reproduction and excrete solid urine
(b) They do not drink water, breathe at a slow rate to conserve water and have their body covered with thick hairs
(c) They feed on dry seeds and do not require drinking water
(d) They excrete very concentrated urine and do not use water to regulate body temperature.
Which two of the above statements for such animals are true?
(a) and (b)
(c) and (d)
(b) and (c)
(c) and (a)
15394.Ornithorhynchus is an example of :
Dinosaur
Monotreme mammal
Marsupial mammal
Eutherian mammal
15395.Silk thread is obtained from silk moth during
Nymph state
Larval state
Pupal state
Adult state
15396.Radial symmetry occurs in which set?
Echinodermata and Coelenterata
Porifera and Coelenterata
Mollusca and Arthropoda
Platyhelminthes and Coelenterata
15397.Column I contains larval stages and Column II contains the group to which it belongs. Match them correctly and choose the right answer from the options given below:
| Column – I | Column – II | ||
|---|---|---|---|
| A | Planula | p | Annelida |
| B | Tornaria | q | Mollusca |
| C | Trochophore | r | Arthropoda |
| D | Bipinnaria | s | Chordata |
| E | Glochidium | t | Echinodermata |
| u | Coelenterata | ||
A = u, B = s, C = p, D = t, E = q
A = q, B = t, C = p, D = s, E = u
A = t, B = s, C = r, D = q, E = p
A = s, B = r, C = q, D = p, E = t
15398.Which one of the following statements is correct?
Germ layers are tissue layers in the embryos of all animals except sponges.
Germ layers include ectoderm, endoderm, and mesoderm.
Flatworms have three germ layers whereas cnidarians and ctenophores have two.
All of these are correct.
15399.The figure shows four animals (a), (b), (c) and (d). Select the correct answer with respect to a common characteristic of two of these animals.
(a)
(b) 
(c) (d) 
(a)
(b) (c) (d)
(a) and (d) have cnidoblasts for self-defence
(c) and (d) have a true coelom
(a) and (d) respire mainly through body wall
(b) and (c) show radial symmetry
15400.The cross section of the body of an invertebrate is given below. Identify the animal which has this body plan.
Round worn
Planaria
Earthworm
Cockroach
15401.Which one of the following statements is incorrect?
Viviparity is the reproductive pattern shown by most mammals
Viviparity occurs primarily in salamanders and caecilians.
In viviparity, a shell does not form around the egg.
Viviparity is not found in species of lizards and snakes.
15402.Which one of the following statements is stated incorrectly regarding cartilaginous fishes?
Cartilaginous fishes have sense organs.
Most cartilaginous fishes have color vision.
Teeth-like placoid scales are found on the skin of cartilaginous fishes.
In cartilaginous fishes, gas exchange occurs in the gills.
15403.Which one of the following statements is incorrect?
Radial symmetry is displayed by sea anemone and aquatic animal.
Fasciola hepatica is also known as the sheep liver fluke.
Triploblastic animals are usually bilaterally symmetrical
Mesoglea is present in between ectoderm and endoderm in Obelia
15404.Tachyglossus is a connecting link between
Reptiles and Birds
Amphibians and Reptiles
Birds and Mammals
Reptiles and Mammals
15405.Which one of the following characteristics is NOT a shared by birds and mammals?
A backbone and internal skeleton
Breathing using lungs
Viviparity
Warm blooded nature
15406.The scientific name of Asian tiger mosquito
Aedes aegypti
Aedes albopictus
Aedes taeniorhynchus
Aedes albolineatus
15409.Radial symmetry is generally exhibited by which animals?
Which are attached with substratum
Which are aquatic
Which have ciliary feeding
Which have one opening of alimentary canal
15410.Animals having a built in thermostat to maintain constant body temperature are known as
Biothermic
Poikilothermic
Oligothermic
Homeothermic
15411.All birds have
omnivorous habit
feathers and can fly
nests to care the babies
calcareous-shelled egg
15412.Which one of the followings in birds indicates their reptilian ancestry?
Eggs with a calcareous shell
Scales on their hind limbs
Four-chambered heart
Two special chambers crop and gizzard in their digestive tract