ECONOMIC BOTANY And OTHERS (Part-I)

1. Vegetables spoil quickly because they contain more- [S.S.C. Online C.P.O. S.I. 5.06.2016 (Shift-II)]

(a) sugars
(b) water
(c) Vitamins
(d) enzymes

Correct Answer: (b) water

Solution:Vegetables spoil quickly because of the high water content in them.

2. Early blight is a common disease of which of the following? [S.S.C. Online C.P.O. S.I. (T-1) 3.07.2017 (Shift-II)]

(a) Potato
(b) Ginger
(c) Cabbage
(d) Cauliflower

Correct Answer: (a) Potato

Solution:Early blight is a common disease of potatoes. It is caused by a fungus called Alternaria solani.

3. The 'solid waste' is also known as- [S.S.C. Online Graduate Level (T-1) 10.09.2016 (Shift-III)]

(a) Sedge
(b) Toxic waste
(c) Sludge
(d) Scrubber

Correct Answer: (c) Sludge

Solution:Sludge is in a semi-solid state. It is also called solid waste as it is generated as a by-product as a result of the treatment of sewage

4. Symbiotic Bacteria responsible for the fixation of atmospheric nitrogen are present in- [S.S.C. Online Graduate Level (T-I) 11.09.2016 (Shift-I)]

(a) peas
(b) wheat
(c) corn
(d) oats

Correct Answer: (a) peas

Solution:Symbiotic bacteria are found in Leguminosae family plants like peas, etc. They are responsible for the fixation of atmospheric nitrogen.

5. In water treatment plant, use of chloramines ensures- [S.S.C. Online Graduate Level (T-I) 11.09.2016 (Shift-I)]

(a) Taste and odour control
(b) Weed control in reservoirs
(c) Disinfection
(d) Removal of permanent hardness

Correct Answer: (c) Disinfection

Solution:Chloramines are used in water treatment plants to disinfect the water.

6. The bare ground between plants is covered with a layer of organic matter like straw. It helps to retain soil moisture. Identify the process. [S.S.C. Online MTS (T-I) 14.08.2019 (Shift-III)]

(a) Mulching
(b) Contour Building
(c) Contour Ploughing
(d) Soil Mixing

Correct Answer: (a) Mulching

Solution:The vacant land between plants is covered with a layer of organic matter such as straw. It helps in retaining soil moisture. This process is called Mulching.

7. Which of the following uses the spawn mechanism to duplicate itself? [S.S.C. Online Graduate Level (T-I) 1.09.2016 (Shift-III)]

(a) Trojan horse
(b) Worm
(c) Keystroke logger
(d) Logic bomb

Correct Answer: (b) Worm

Solution:

The worm adopts a spawn mechanism to duplicate itself.

8. In a rainforest, the vegetation that grows under the shade of a canopy is known as- [S.S.C. Online Graduate Level (T-I) 6.09.2016 (Shift-I)]

(a) Crown
(b) Canopy
(c) Understorey
(d) Forest floor

Correct Answer: (c) Understorey

Solution:The vegetation that grows under the canopy of a tree in a rainforest is called 'Understorey'. It is the habitat of many birds, snakes, lizards, predatory animals, insects, etc. This is the upper part of the forest floor.

9. Which one of the following is an insectivorous plant? [S.S.C. Online CHSL (T-1) 15.01.2017 (Shift-III)]

(a) Utricularia
(b) Sequoia Gigantia
(c) Nostoc
(d) Bryophyta

Correct Answer: (a) Utricularia

Solution:Utricularia is an insectivorous aquatic plant, also known as bladderworts. These plants make up for the lack of nitrogen by digesting insects.

10. The auxiliary buds [S.S.C. Online CHSL (T-I) 23.01.2017 (Shift-I)]

(a) Grow endogenously from the pericycle
(b) Arise endogenously from the main growing point
(c) Is an embryonic shoot located in the axil of a leaf
(d) Arise exogenously from the epidermis

Correct Answer: (c) Is an embryonic shoot located in the axil of a leaf

Solution:Axillary buds originate from the corners of the leaf, i.e. the part located on the axis. It is a type of embryonic shoot.