Dear Readers,

NEET is the most famous and important medical entrance examination held in our country. This exam is an objective type, an offline test which includes 4 sections namely– Physics, Chemistry, Botany, and Zoology. The maximum marks that can be scored are 720 marks and have 180 questions.

About half of the paper consists of questions from Biology, as the NEET exam essentially focuses on capacitating students to go for seats in medical courses. One of the most significant and crucial sections in the NEET exam is of Biology. It comprises of theories, descriptions, discoveries, diagrams, definitions, explanations of differences, and relations. The majority of the topics covered in the NEET syllabus are from the NCERT syllabus of Class 11 & 12 and other related sources become part of the rest of the syllabus.

Clear Exam curates a list of articles selected by professionals who recommend the highly vital topics for NEET exams. The table below takes you directly to the respective topic where the in-depth article and the MCQs are available for an easy and productive learning experience. Prior to solving NEET question papers or practicing mock tests, you must ensure to study the basic concepts in NEET and practice a few sample questions related to this exam. Students will be covered for all their studies as the topics are available from basics to even the most advanced. 

Q1. “Triploblastic, unsegmented, acoelomate exhibiting bilateral symmetry and reproducing both asexually and sexuality, with some parasitic forms”.
The above description is the characteristic of phylum
  •  Annelida
  •  ctenophore
  •  cnidaria
  •  Platyhelimenthes
Phylum-Platyhelminthes (flatworms) are the only forms, with triploblastic, unsegmented, acoelomate and bilateral symmetry. They reproduce both sexually and asexually and also have some parasitic forms, e.g., Fasciola, Taenia, etc.

Q2. How many hearts are found in earthworm?
  •  8 (four pairs)
  •  2 (one pair)
  •  8 (four pairs)
  •  12 (six pairs)
In each of the segments, 7, 9, 12 and 13 of earthworm, a pair of large, thick, rhythmically contractile vertical vessels celled hearts are present, i.e., four pairs of hearts are present.

Q3. One of the characteristic of Hydra is:
  •  Predation
  •  Matabarism
  •  Hibernation
  •  Mimicry
Hydra is exclusively carnivorous and obtained its food as a predator.

Q4. The skull of frog is:
  •  Trycondylic
  •  Monocondylic
  •  Dicondylic
  •  Non-condylic
Skull of frog is triangular in shape. It is decondylic and platybaric due to presence of two occipital condyles and absence of an inter orbital septum. The skull is completely cartilagenous in tadpole stage but becomes mostly bony in the adult frog.

Q5. Which parasite is present in seminal vesicle of earthworm?
  •  Monocystis
  •  Nosema
  •  Sarcocystis
  •  Nictotherus
Monocystis are typically endoparasites of earthworm and occur in their coelom and seminal vesicles.

Q6. Which of the following is correctly states as it happens in the common cockroach?
  •  Oxygen is transported by haemoglobin in blood
  •  Nitrogenous excretory product is urea
  •  The food is ground by mandibles and gizzard
  •  Malpighian tubules are excretory organs projecting out from the colon
In cockroach, mandibles are a pair of hard, strong, large, dark coloured triangular structures which move in horizontal motion and crush food between them. Gizzard or proventriculus has an outer layer of thick circular muscles and thick inner cuticle forming six highly chitinous plate called teeth. The gizzard acts as the grinding chamber and helps in grinding the food particles.

Q7. Pheromone is:
  •  A product of endocrine gland
  •  Used for animal communication
  •  mRNA
  •  Always protein
Pheromones are used for animal communication. These are screted from exocrine glands as liquid, transmitted as liquid or gases and smelled or tasted by other animals of the same species.

Q8. The poisonous fluid present in nematocyst of Hydra is :
  •  Venom
  •  Hematin
  •  Toxin
  •  hypnotoxin
Nematocyst is filled with a poisonous fluid called hypnotoxin, which is a mixture of proteins and phenols. Nematocyst is a definite response of Hydra for offence, defence, food capture, anchorage and locomotion.

Q9. List the phyla in the correct order of their placement in classification
I. Chordata
II. Annelida
III. Arthropoda
IV. Platyhelminthes
V. Ctenophora
VI. Aschelminthes
  •  VI, I, V, IV, III, II
  •  II, III, IV, V, VI, I
  •  V, IV, VI, II, III, I
  •  III, II, VI, I, V, IV
The correct order of the phyla is Ctenophora, Platyhelminthes, Aschelminthess, Annelida, Arthropoda and Chordata

Q10. In earthworm, the dorsal wall of the intestine from the 26th segment to 95th segment forms a median internal fold called:
  •  Trochophore
  •  Typhlosole
  •  Clitellum
  •  Trachea
Typhlosole is a highly glandular, vascular, longitudinal ridge, increasing the area for absorption of digested food.

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