Multiple Choice Questions

Advertisement

Peyer's patches produce

  • mucus

  • trypsin

  • lymphocytes

  • enterokinase


C.

lymphocytes

Peyer's patches are found in ileum and made up of lymph nodes. These are aggregates of lymphocytes where B cells from a central follicle and are surrounded by T-cells and macrophages which help the T-cells to recognise Antigen Mucosa Associated Lymphoid Tissue (MALT) is made up of Peyer's patches.


Advertisement

In CAM plants

  • stomata open in day and close at night

  • stomata remain open in day and night both

  • stomata remain closed in day and night both

  • stomata open at night and close in day


Incomplete division of egg during cleavage is known as

  • meroblastic

  •  holoblastic

  • meridional

  • spiral


The effect of intraspecific competition on niches is to make them

  • smaller

  • larger

  • change location

  • more triangular


A person who is trisomic for twenty first pair of chromosome suffers from

  • Klinefelter's syndrome

  • Down's syndrome

  • Turner's syndrome

  • None of the above


Advertisement

The immediate cause of induction of ovulation in female is the large plasma surge of

  • progesterone

  • estradiol

  • LH

  • FSH


In Hatch and Slack type plants CO2 acceptor is

  • malate

  • pyruvate

  • phosphoenol pyruvate

  • aspartate


The larvicidial fish used in biocontrol of mosquitoes

  • Gambusia

  • Hilsa

  • Scatophagus

  • Gold fish


Organ of Corti is found in

  • heart

  • kidneys

  • inner ear

  • nasal chamber


Advertisement

In which blood group antigen are absent

  • O

  • A

  • B

  • AB