Subject

Biology

Class

NEET Class 12

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

 Multiple Choice QuestionsMultiple Choice Questions

1.

Which of the following character is presence essentialy in chordates ?

  • Ventral spinal chord

  • Dorsal heart

  • Pharyngeal gill slits

  • Blood flow in forward direction in ventral blood vessels


C.

Pharyngeal gill slits

Chordate animals at some time in their life history exhibit the following three diagnostic characters

(1) Presence of notocnord.

(2) Presence of dorsal tubular nerve cord.

(3) Presence of gill clifts during development

Beside these some other characters are :

(a) ventral heart

(b) Hepatic portal system.


2.

Neural canal is present in :

  • humerus

  • tibia-fibula

  • vertebral column

  • cranial bones


C.

vertebral column

A typical vertebra has a centrum or body and nerval arch. The hole formed by the neural arch is the vertebral foramen. The vertebral formaina of all vertebrae form the vertebral canal or neural canal.


3.

Sigmoid notch is formed by :

  • cavity formed by humerus

  • cavity formed by radio ulna

  • cavity formed by tibia fibula

  • cavity formed by femur


B.

cavity formed by radio ulna

Radius and ulva are the bones of the fore-arm. Which are closely held together. The ulna is the long bone and bear a deep sigmoid notch for articulation with the trochlea of the humerus.


4.

Chloragogen cells of earthworms are analogous to vertebrate :

  • lungs

  • liver

  • gut

  • kidneys


B.

liver

Chloragogen cells of earthworm are analogous to liver of vertebrates.


5.

Food storage in Leucosolenia occur by :

  • ostia

  • osculum

  • thesocyte

  • spongocoel


C.

thesocyte

Food storage in Leucosolenia occur by thesocyte. Thesocytes have lobore pseudopodia and are filled with food reserves, thus acting as storage cells.


6.

Trochophore is the larva of :

  • Neopilina

  • Chiton

  • Pila

  • all of these


D.

all of these

Trochophore is cilliated, larval stage of polychaetes, molluscs and rotifers. Neopliliva, chiton and Pila belongs to Phylum- Mollusca. Molluscan development is either direct or with metamorphosis through the trochosphore stage.


7.

Blood leaving liver and going towards heart is rich in :

  • bile

  • urea

  • ammonia

  • oxygen


B.

urea

Urea formation takes place in liver through ornithine cycle. The blood leaving liver and going towards heart has high amount of urea.


8.

Class Crustacea differ from Insecta in having:

  • two pairs of antennae

  • jointed foot

  • chitinous cuticle

  • none of these


A.

two pairs of antennae

Main characteristics of Class- Crustacea and Insects are as follows:-

  1. Class Crustaces: They are mostly aquatic with gills, two pairs of antennal and three pairs of jaws, appendages. These are mostly biramous and always more than four in the trunk region. Eg, Prawn, Crab etc.
  2. Class- Insecta : These are hexapod arthropods with a pair of antennae and three pairs of jaws. Eg, Cockroach, Grasshopper etc.


9.

'Digestion' word means :

  • buring of food

  • oxidation of food

  • hydrolysis of food

  • break down of food


C.

hydrolysis of food

Digestion is a process in which non-diffusible foods are converted into diffusible foods with the help of digestive enzymes. It is mostly carried out by the process of hydrolysis using water molecules for the cleavage. The enzymes which bring about digestion are called hydrolases.


10.

Maximum absorption of water occurs in :

  • colon

  • rectum

  • large intestine

  • small intestine


A.

colon

The chief functions of the large intestine are the absorption of water and the elimination of solid wastes. Large intestine in divided into three parts, i.e. caecum, colon and rectum.

In mammals, colon has essential water absorbing role in preparation of faeces.