Biology - 01

01. Which one of the following is not an insect:

  • 1Bed bug
  • 2House fly
  • 3Mosquitoes
  • 4Spider
Answer:- 1
Explanation:-

Solution:
Spider

02. Reflex actions are controlled by :

  • 1The cells
  • 2The Spinal Chord
  • 3The Brain
  • 4The Nerves
Answer:- 1
Explanation:-

Solution:
The Spinal Chord.

03. Biotic component of the environment does not include-

  • 1Soil system
  • 2Animal system
  • 3Micro-organism system
  • 4Plant system
Answer:- 1
Explanation:-

Solution:
Animal, Micro organism and Plants are biotic components of the environment while soil along with other landforms are non-biotic components of the environment.

04. Ptyalin is an enzyme produced in the

  • 1salivary glands
  • 2pituitary glands
  • 3thyroid glands
  • 4pancreas
Answer:- 1
Explanation:-

No explanation is given for this question Let's Discuss on Board

05. Nitrogen is fixed in ecosystems in ways stated below. Which one of the statements below is false?

  • 1By cyanobacteria
  • 2By electrical discharges in the atmosphere
  • 3By industrially synthesised fertilizer
  • 4By denitrification
Answer:- 1
Explanation:-

No explanation is given for this question Let's Discuss on Board

06. Pollen grains in plants are produced in

  • 1roots
  • 2leaves
  • 3flower
  • 4stem
Answer:- 1
Explanation:-

No explanation is given for this question Let's Discuss on Board

07. Pollination by wind is called

  • 1anemophily
  • 2hydrophily
  • 3zoophily
  • 4entomophily
Answer:- 1
Explanation:-

No explanation is given for this question Let's Discuss on Board

08. Oxyreductases, transferases, hydrolases, lyases, isomerases and ligases are all classes of

  • 1hormones
  • 2enzymes
  • 3proteins
  • 4vitamins
Answer:- 1
Explanation:-

No explanation is given for this question Let's Discuss on Board

09. Plants that grow under average temperature and moisture are called:

  • 1halophytes
  • 2hydrophytes
  • 3mesophytes
  • 4xerophytes
Answer:- 1
Explanation:-

No explanation is given for this question Let's Discuss on Board

10. One day you wake with a sore throat and a runny nose. Your doctor takes a swab from your throat, sends it to a lab, and telephones you the next day to say that antibiotic will not help you get better. Which of the following is the most likely reason for the doctor's statement?

  • 1Having waited a day, it is too late to take an antibiotic
  • 2You need an antiseptic, not an antibiotic
  • 3You need to be vaccinated instead of taking an antibiotic
  • 4You are infected by a virus
Answer:- 1
Explanation:-

No explanation is given for this question Let's Discuss on Board

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