11. Which one of the following is a modified stem? (UPSC Prelims 1996)
[A] Carrot
[B] Sweet Potato
[C] Coconut
[D] Potato
Show Answer
Correct Answer: D [Potato]
Notes:
Potato tuber bears buds in small pits known as eyes. Buds develops to branches. Some of the branches become green, erect and leafy stems that grow horizontally underground.
12. Which among the following is the method of growing plants in the absence of soil?
[A] Hydrology
[B] Hydrotectonics
[C] Hydroponics
[D] Hydrochronology
Show Answer
Correct Answer: C [Hydroponics]
Notes:
The method of growing plants in the absence of soil is called as hydroponics. The required suppliments to the plants are supplied through the mineral nutrient solutions.
13. Which vitamin deficiency leads to Scurvy?
[A] Vitamin B3
[B] Vitamin C
[C] Vitamin K
[D] Vitamin B9
Show Answer
Correct Answer: B [Vitamin C]
Notes:
Vitamin C deficiency leads to scurvy. Symptoms of scurvy include gum bleeding, loose teeth, bulge in eyes.
14. Which vitamin is also called as retinol?
[A] Vitamin A
[B] Vitamin C
[C] Vitamin D
[D] Vitamin K
Show Answer
Correct Answer: A [Vitamin A]
Notes:
Vitamin A is also called as retinol deficiency of which results in xeropthalmia. Chemical formula for Vitamin A is C20H30O.
15. Which vitamin deficiency leads to the disease rickets?
[A] Vitamin A
[B] Vitamin C
[C] Vitamin D
[D] Vitamin K
Show Answer
Correct Answer: C [Vitamin D]
Notes:
Rickets is a disease related to bone disorder due to the deficiency of vitamin D. Vitamin D is a fat soluble vitamin. Vitamin D is also called as calciferol. Lack of calcium also leads to rickets.
16. Who is the father of Genetics?
[A] Gregor Mendel
[B] Thomas Hunt Morgan
[C] Francis Galton
[D] Krateuas
Show Answer
Correct Answer: A [Gregor Mendel]
Notes:
Gregor Mendel was a botanist, educator and Augustinian bishop who was the first to lay the mathematical foundations of the science of genetics, which came to be known as Mendelism.
17. Who is known as father of soil science?
[A] Norman Ernest Borlaug
[B] V.V. Dokuchaev
[C] Liberty Hyde Bailey
[D] Eratosthenes
Show Answer
Correct Answer: B [V.V. Dokuchaev]
Notes:
Vasily Vasil’evich Dokuchaev is the father of soil science.
18. Who gave the theory of Five King of Classification?
[A] RH Whittaker
[B] Ernest Haeckel
[C] Copeland
[D] Carolus Linnaeus
Show Answer
Correct Answer: A [RH Whittaker]
Notes:
The theory of Five Kingdom of classification (Monera, Protista, Fungi, Plantae and Animalia) is given by R. H. Whittaker in 1969.
19. Which of the following protects the body from infectious disease?
[A] Leukocytes
[B] Red Blood Cells
[C] Endoplasmic Reticulum
[D] Golgi Bodies
Show Answer
Correct Answer: A [Leukocytes]
Notes:
White blood cells (WBC), also called leukocytes or leukocytes. Immune system cells that help protect our body from infectious diseases.
20. Who among the following discovered the cell wall?
[A] Robert Hooke
[B] Boveri
[C] J Rhodin
[D] Van Beneden
Show Answer
Correct Answer: A [Robert Hooke]
Notes:
A plant cell wall was first observed and named by Robert Hooke in 1665.
