Recent questions in Diversity in Living World

Match the following and choose the most appropriate option: (each option on both columns can be matched to multiple option on the another side ie right or left) eg. A-1,2 ; B,C,D-3 ; A,B,C-3,4

asked Apr 2, 2014 by pady_1

1 answer

Match the following and choose the most appropriate option: (each option on both columns can be matched to multiple option on the another side ie right or left) eg. A-1,2 ; B,C,D-3 ; A,B,C-3,4

asked Apr 2, 2014 by pady_1

1 answer

Match the following and choose the most appropriate option: (each option on both columns can be matched to multiple option on the another side ie right or left) eg. A-1,2 ; B,C,D-3 ; A,B,C-3,4

asked Apr 2, 2014 by pady_1

1 answer

Regarding the fig. Name the parts and the organism

asked Mar 26, 2014 by pady_1

1 answer

Class – Mammalia : 1. Sexes are separate 2. Fertilisation is internal. 3. They are always viviparous 4. Development is direct. Regarding 1,2,3 and 4:

asked Mar 20, 2014 by pady_1

1 answer

Class – Mammalia : 1. Heart is four- chambered. 2. Respiration is by lungs. 3. They are poikilothermous. Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

1 answer

Class – Mammalia : 1. The skin of mammals is unique in possessing hair. 2. External ears or pinnae are absent in most species. 3. Different types of teeth are present in the jaw. Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

1 answer

Class – Aves : 1. Sexes are separate. 2. Fertilisation is external. 3. They are oviparous 4. Development is direct. Regarding 1,2,3 and 4:

asked Mar 20, 2014 by pady_1

1 answer

Class – Aves : 1. Heart is completely four- chambered. 2. Respiration is by lungs. 3. Air sacs connected to lungs supplement respiration. Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

1 answer

Class – Aves : 1. The characteristic features of Aves are the presence of feathers 2. Most of them can fly 3.Ostrich is one of the flightless birds. Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

1 answer

Class – Reptilia : 1. Sexes are separate. 2. Fertilisation is internal. 3. They are oviparous 4. Development is direct. Regarding 1,2,3 and 4:

asked Mar 20, 2014 by pady_1

1 answer

Class – Amphibia : 1. Sexes are separate. 2. Fertilisation is external. 3. They are viviparous 4. Development is direct. Regarding 1,2,3 and 4:

asked Mar 20, 2014 by pady_1

1 answer

Class – Amphibia : 1. Alimentary canal, urinary and reproductive tracts open into a common chamber called cloaca 2. Cloaca opens to the exterior. 3. These are cold-blooded animals. Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

1 answer

Class – Amphibia : 1. The amphibian skin is dry. 2. They do not have scales. 3. They don't have eyelids. Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

1 answer

Class – Amphibia : 1. Most of them have two pairs of limbs. 2. Body is divisible into head and trunk. 3. Tail may be present in some. Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

1 answer

Class – Osteichthyes : 1. Sexes are separate. 2. Fertilisation is usually internal. 3. They are mostly oviparous 4. Development is direct. Regarding 1,2,3 and 4:

asked Mar 20, 2014 by pady_1

1 answer

Class – Osteichthyes : 1. Air bladder is present 2. Air bladder regulates buoyancy (if present in any aquatic organism). 3. Heart is two- chambered 4. Heart has one auricle and one ventricle. Regarding 1,2,3 and 4:

asked Mar 20, 2014 by pady_1

1 answer

Class – Chondrichthyes : 1. Teeth are modified placoid scales 2. Teeth are directed forwards. 3. Their jaws are very powerful. 4. These animals are predaceous. Regarding 1,2,3 and 4:

asked Mar 20, 2014 by pady_1

1 answer

Regarding Class – Chondrichthyes : 1. They are marine animals 2. They have streamlined body 3. They have cartilaginous exoskeleton Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

1 answer

Regarding Class – Cyclostomata : 1. Cyclostomes are marine 2. But they migrate to fresh water for spawning . 3. After spawning, they die within a few days. Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

1 answer

Regarding Class Cyclostomata : 1. They have paired fins 2. Their body is devoid of scales. 3. Cranium and vertebral column are bony. 4. Circulation is of closed type Regarding 1,2,3 and 4:

asked Mar 20, 2014 by pady_1

1 answer

Regarding Class – Cyclostomata : 1. They have an elongated body 2. They bear 6-15 pairs of gill slits. 3. Cyclostomes have a circular mouth without jaws Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

1 answer

1. Agnatha includes Class Cyclostomata. 2. Tetrapoda includes Pisces, Amphibia, Reptilia, Aves and Mammals 3. Pisces includes Chondrichthyes and Osteichthyes. Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

2 answers

1. Vertebrata includes Divisions Agnatha and Gnathostomata. 2. Gnathostomata includes Super Classes Pisces and Tetrapoda. 3. Divisions Agnatha includes Class Cyclostomata. Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

1 answer

Regarding vertebrates : 1. They have a ventral muscular heart with two, three or four chambers. 2. They have kidneys for excretion and osmoregulation 3. They have paired appendages which may be limbs but never fins.

asked Mar 20, 2014 by pady_1

1 answer

1. In Urochordata, notochord is present only in larval tail. 2. In Cephalochordata,notochord extends from head to tail region 3. In Cephalochordata,notochord is persistent throughout their life. Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

1 answer

Phylum – Hemichordata : 1. Sexes are separate. 2. Fertilisation is internal. 3. Development is direct . Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

1 answer

Phylum – Hemichordata : 1. Circulatory system is of closed type. 2. Respiration takes place through gills. 3. Excretory organ is proboscis gland. Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

1 answer

1. Hemichordata was considered as a sub-phylum under phylum Chordata earlier. 2. Now it is placed as a separate phylum under non-chordata. 3. This phylum consists of a small group of worm-like marine animals. Regarding 1,2 and 3 :

asked Mar 20, 2014 by pady_1

1 answer

Phylum Echinodermata : 1. Digestive system is complete 2. They have mouth on the upper (dorsal) side 3. Anus is on the lower (ventral) side. Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

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In Mollusca : 1. The posterior head region has sensory tentacles. 2. The mouth contains a file-like rasping organ for feeding 3. The file-like rasping organ for feeding is called morula Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

1 answer

In Mollusca : 1. A soft and spongy layer of skin forms a mantle over the calcarious hump. 2. The space between the hump and the mantle is called the mantle cavity 3. In mantle cavityfeather like gills are present. Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

1 answer

Regarding Molluscs : 1. Body is covered by a calcareous shell 2. Body is unsegmented 3. They have a distinct head, muscular foot and visceral hump Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

1 answer

Regarding Arthropoda : 1. They are mostly ovoviviparous. 2. Development is direct. 3. Development is indirect. Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

1 answer

Regarding Arthropoda : 1. It is the second largest phylum of Animalia 2. It includes insects. 3. Over one-thirds of all named species on earth are arthropods Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

1 answer

In Annelida : 1. Members of phylum Annelida are dioecious. 2. Members of phylum Annelida are monoecious 3. Reproduction is sexual. Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

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In Annelida : 1. A closed circulatory system is present. 2. Neural system consists of paired ganglia 3. Paired ganglia connected by lateral nerves to a single ventral nerve cord. Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

1 answer

Regarding Aschelminthes: 1. Fertilisation is internal 2. Development is direct. 3. Development is indirect. Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

1 answer

Regarding Aschelminthes: 1. Sexes are separate 2. They are monoecious. 3. Often females are longer than males. Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

1 answer

Regarding Aschelminthes: 1. Alimentary canal is incomplete 2. They a well- developed muscular pharynx. 3. An excretory tube removes body wastes from the body cavity through the excretory pore. Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

1 answer

Regarding Platyhelminthes : 1. Planaria possess high regeneration capacity. 2. Tapeworm is Taenia and it is an intestinal parasite. 3. Fasciola hepatica is Liver fluke Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

1 answer

Regarding Platyhelminthes : 1. Sexes are separate. 2. Fertilisation is internal. 3. Development is through many larval stages Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

1 answer

Regarding Platyhelminthes : 1. They are mostly endoparasites found in animals including human beings. 2. Hooks and suckers are present in the parasitic forms. 3. Some of them absorb nutrients from the host directly through their body surface. Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

1 answer

In Ctenophores: 1. Sexes are separate. 2. Reproduction takes place only by sexual means. 3. Fertilisation is internal. 4. Development is direct Regarding 1,2,3 and 4:

asked Mar 20, 2014 by pady_1

1 answer

1. Cnidarians exhibit one of two basic body forms called polyp and medusa. 2. Some cnidarians which exist in both forms exhibit alternation of generation. 3. Alternation of generation is Metagenesis. 4. Polyps produce medusae sexually 5. Medusae form the polyps asexually Regarding 1,2,3,4 and 5:

asked Mar 20, 2014 by pady_1

1 answer

1. Cnidarians exhibit two basic body forms called polyp and medusa. 2. Polyp is a sessile and spherical form 3. Medusa is umbrella-shaped and free-swimming Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

1 answer

1. Cnidarians have a central gastro-vascular cavity 2. They have a single opening, mouth or hypostome. 3. Digestion is extracellular 4. Digestion is intracellular. Regarding 1,2,3 and 4:

asked Mar 20, 2014 by pady_1

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In Sponges : 1. Eggs and sperms are produced by different individual. 2. Fertilisation is external 3. Development is indirect having a larval stage which is morphologically similar to the adult. Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

1 answer

In Sponges : 1. Digestion is extracellular. 2. The body is supported by a skeleton made up of spicules or spongin fibres. 3. Sexes are separate Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

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1. Sponges have a water transport or canal system. 2. Water enters through minute pores (osculum) in the body wall into a central cavity, spongocoel, from where it goes out through the ostia. 3. This pathway of water transport is helpful in food gathering, respiratory exchange and removal of waste. Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

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