STD 12 - 4. principal of inheritance and variation — NEET STD 11 Science — Question

Assertion: Failure of secretion of hormone vasopressin causes diabetes mellitus in the patient.
Reason: Vasopressin increases the volume of urine by increasing the reabsorption of water from the urine.

This part is not associated with nerve ring.

Pancreas secretes

Which of the following statements are correct for neural tissue ?
(i) Neurons, the unit of neural system are excitable cells.
(ii) The neuroglial cell which constitutes the rest of the neural system protects and support neurons.
(iii) Neuroglia makes up more than one half the volume of neural tissue in our body.
(iv) When a neuron is suitably stimulated, an electrical disturbance is generated which swiftly travels along its plasma membrane.

Malpighian body or renal corpuscle is

Which of the following is incorrect regarding Analogy ?
(i) Organs having similar functions but different in their basic plan of development are known as analogous organs.
(ii) Vertebrate hearts or brains is a examples of analogy.
(iii) Analogous structures are result of convergent evolution.
(iv) Flippers of Penguins and Dolphins are examples of analogy.
(v) Sweet potato and Potato represents analogy.
(vi) Eyes of Rabbits and Rat are analogous organs.

Tick the wrong option regarding human beings

What is meaning of Greek word 'meristos'

Which statements are not true regarding chromosome theory of inheritance ?
(i) It was proposed by Sutton and Boveri independently in 1902.
(ii) No similarity between the transmission of hereditary characters and behaviour of chromosomes during inheritance.
(iii) Both chromosomes as well as genes occur in pairs in the somatic or diploid cells.
(iv) A gamete contains only one chromosome of a type and only one of the two alleles of a character.
(v) The paired condition of both chromosomes as well as Mendelian factors is restored during fertilization.

Corpus callosum is seen in