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Biology Quiz - 2, General Knowledge - Railways MCQ


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25 Questions MCQ Test - Biology Quiz - 2, General Knowledge

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Biology Quiz - 2, General Knowledge - Question 1

O2 released in the process of photosynthesis comes from

Biology Quiz - 2, General Knowledge - Question 2

Placenta is the structure formed

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Biology Quiz - 2, General Knowledge - Question 3

Plants hormone that induces cell division is

Biology Quiz - 2, General Knowledge - Question 4

Neurospora is used as genetic material because

Biology Quiz - 2, General Knowledge - Question 5

Phloem is a tissue found in

Biology Quiz - 2, General Knowledge - Question 6

N2 content is kept constant in the biosphere due to

Biology Quiz - 2, General Knowledge - Question 7

out of proteins, lipids and carbohydrates present in a cell membrane, what is true?

Biology Quiz - 2, General Knowledge - Question 8

Potato is a modified form (outgrowth) of

Biology Quiz - 2, General Knowledge - Question 9

Of the following taxonomic categories which is the most inclusive (i.e. is the highest in hierarchy)?

Biology Quiz - 2, General Knowledge - Question 10

Prothrombin which helps in clotting of blood is released by

Biology Quiz - 2, General Knowledge - Question 11

Myopia is connected with

Biology Quiz - 2, General Knowledge - Question 12

Most of the red, blue and purple colours of plants are due to a pigment called

Detailed Solution for Biology Quiz - 2, General Knowledge - Question 12
Anthocyanin - A blue, violet, or red flavonoid pigment found in plants.
Biology Quiz - 2, General Knowledge - Question 13

Plants developing in dry conditions are

Biology Quiz - 2, General Knowledge - Question 14

Plants growing on sand are called as

Biology Quiz - 2, General Knowledge - Question 15

Our skin, when exposed to excess sunlight, becomes dark. This is because our skin pigments called

Biology Quiz - 2, General Knowledge - Question 16

Ramapithecus and Cro-Magnon man are considered

Biology Quiz - 2, General Knowledge - Question 17

Normal adult human male has

Biology Quiz - 2, General Knowledge - Question 18

Plants wilt due to excess of

Biology Quiz - 2, General Knowledge - Question 19

Poison glands of snakes are homologous to

Biology Quiz - 2, General Knowledge - Question 20

Radical vascular bundles are those in which

Detailed Solution for Biology Quiz - 2, General Knowledge - Question 20

With the help of examples, explain the various types of vascular bundles.

In angiosperms the vascular bundles are mainly of three types (i) radial (ii) conjoint (iii) concentric.

(i) Radial : Presence of radial vascular bundles is the characteristic feature of roots. Those vascular bundles in which xylem and phloem are present on different radii are known as radial vascular bundles. In between xylem and phloem bundles parenchymatous cells are present.

(ii) Conjoint : In these vascular bundles xylem and phloem are present on the same radii. Conjoint vascular bundles may be collateral (phloem is present only outer to xylem) or bicollateral (phloem is present on both sides of xylem). If cambium is present between xylem and phloem then the vascular bundle is known as open, otherwise it is called closed.

(iii) Concentric : Those vascular bundles in which one type of vascular tissue is surrounded by another type are known as concentric vascular bundles. These bundles may be amphivasal or leptocentric(phloem is completely surrounded by xylem) or amphicribal or hardocentric (xylem is completely surrounded by phloem). Amphivasal bundles are found in Dracaena and Yucca. Amphicribal bundles are found in stamens of many dicots etc.

Radical vascular bundles are those in which xylem and phloem occur on the different radii.

Biology Quiz - 2, General Knowledge - Question 21

Plant bends towards the source of light on account of the movement of curvature known as

Biology Quiz - 2, General Knowledge - Question 22

Monotremes are unique mammals because they

Biology Quiz - 2, General Knowledge - Question 23

Plant have ____ while animals lack it.

Biology Quiz - 2, General Knowledge - Question 24

Osmosis is the flow of solution from higher concentration to a solution of lower concentration through a semi permeable membrane. What is incorrect in this statement?

Biology Quiz - 2, General Knowledge - Question 25

Ptyalin is an enzyme produced in the

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