Recent questions tagged 2018

After karyogamy followed by meiosis, spores are produced exogenously in

asked Aug 21, 2018 by pady_1

1 answer

Winged pollen grains are present in

asked Aug 21, 2018 by pady_1

1 answer

Which of the following pairs is wrongly matched ?

asked Aug 21, 2018 by pady_1

1 answer

Which of the following flowers only once in its life-time ?

asked Aug 21, 2018 by pady_1

1 answer

The experimental proof for semiconservative replication of DNA was first shown in a

asked Aug 21, 2018 by pady_1

3 answers

Select the correct match

asked Aug 21, 2018 by pady_1

1 answer

Which of the following has proved helpful in preserving pollen as fossils ?

asked Aug 21, 2018 by pady_1

2 answers

Select the correct statement

asked Aug 21, 2018 by pady_1

1 answer

Offsets are produced by

asked Aug 21, 2018 by pady_1

1 answer

Which of the following is not a product of light reaction of photosynthesis?

asked Aug 21, 2018 by pady_1

2 answers

The Golgi complex participates in

asked Aug 21, 2018 by pady_1

1 answer

Two two functional groups characteristic of sugars are

asked Aug 21, 2018 by pady_1

1 answer

Stomata in grass leaf are

asked Aug 21, 2018 by pady_1

1 answer

Stomatal movement is not affected by

asked Aug 21, 2018 by pady_1

1 answer

Which among the following is not a prokaryote ?

asked Aug 21, 2018 by pady_1

1 answer

Which of the following is true for nucleolus ?

asked Aug 21, 2018 by pady_1

1 answer

The stage during which separation of the paired homologous chromosomes begins is

asked Aug 21, 2018 by pady_1

1 answer

Pollen grains can be stored for several years in liquid nitrogen having a temperature of

asked Aug 21, 2018 by pady_1

1 answer

Double fertilization is

asked Aug 21, 2018 by pady_1

1 answer

Which of the following elements is responsible for maintaining turgor in cells ?

asked Aug 21, 2018 by pady_1

1 answer

In which of the following forms is iron absorbed by plants ?

asked Aug 21, 2018 by pady_1

1 answer

Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other ?

asked Aug 21, 2018 by pady_1

2 answers

Oxygen is not produced during photosyntheis by

asked Aug 21, 2018 by pady_1

1 answer

What is the role of $NAD^+$ in cellular respiration ?

asked Aug 21, 2018 by pady_1

1 answer

Which of the following is a secondary pollutant ?

asked Aug 21, 2018 by pady_1

1 answer

Niche is

asked Aug 21, 2018 by pady_1

1 answer

In stratosphere, which of the following elements acts as a catalyst in degradation of ozone and release of molecular oxygen ?

asked Aug 21, 2018 by pady_1

2 answers

World Ozone Day is celebrated on

asked Aug 21, 2018 by pady_1

1 answer

Natality refers to

asked Aug 21, 2018 by pady_1

1 answer

What type of ecological pyramid would be obtained with the following data ? Secondary consumer : 120 g Primary consumer : 60 g Primary producer : 10 g

asked Aug 21, 2018 by pady_1

1 answer

Identify the major products P, Q and R in the following sequence of reactions :

asked Aug 21, 2018 by pady_1

1 answer

Which of the following compounds can form a zwitterion ?

asked Aug 21, 2018 by pady_1

1 answer

Given var der Waals constant for $NH_3, H_2, O_2$ and $CO_2$are respectively 4.17, 0.244, 1.36 and 3.59, which one of the following gases is most easily liquefied ?

asked Aug 21, 2018 by pady_1

1 answer

The solubility of $BaSO_4$ in water is $2.42 \times 10^{-3} gL^{-1}$ at 298 K. The value of its solubility product $(K_{sp})$ will be (Given molar mass of $BaSO_4 = 233 \; g\;mol^{-1}$ )

asked Aug 21, 2018 by pady_1

1 answer

On which of the following properties does the coagulating power of an ion depend ?

asked Aug 21, 2018 by pady_1

1 answer

Following solutions were prepared by mixing different volumes of $NaOH$ and $HCl$ of different concentration : pH of which one of them will be equal to 1 ?

asked Aug 21, 2018 by pady_1

1 answer

The type of isomerism shown by the complex $[CoCl_2(en)_2]$ is

asked Aug 21, 2018 by pady_1

1 answer

Which one of the following ions exhibits d-d transition and paramagnetism as well ?

asked Aug 21, 2018 by pady_1

1 answer

The geometry and magnetic behaviour of the complex $[Ni(CO)_4]$ are

asked Aug 21, 2018 by pady_1

1 answer

Iron carbonyl, $Fe(CO)_5$ is

asked Aug 21, 2018 by pady_1

1 answer

Match the metal ions given in Column I and the spin magnetic moments of the ions given in Column II and assign the correct code :

asked Aug 21, 2018 by pady_1

1 answer

Compound A, $C_8 H_{10}O$, is found to react with $NaOI$ (produced by reacting Y with NaOH) and yield a yellow precipitate with characteristic smell. A and Y are respectively

asked Aug 21, 2018 by pady_1

1 answer

Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their

asked Aug 21, 2018 by pady_1

1 answer

In the reaction The electrophile involved is

asked Aug 21, 2018 by pady_1

1 answer

Which one of the following elements is unable to form $MF_6^{3-}$ ion ?

asked Aug 21, 2018 by pady_1

1 answer

The correct order of N-compounds in its decreasing order of oxidation states is

asked Aug 21, 2018 by pady_1

2 answers

In the structure of $CIF_3$, the number of Ione pair of electrons on central atom 'Cl' is

asked Aug 21, 2018 by pady_1

1 answer

The correct order of atomic radii in group 13 elements is

asked Aug 21, 2018 by pady_1

1 answer

Considering Ellingham diagram, which of the following metals can be used to reduce alumina ?

asked Aug 21, 2018 by pady_1

2 answers

Which of the following statements is not true for halogen ?

asked Aug 21, 2018 by pady_1

1 answer

Ask Questions, Get Answers