Recent questions in Biology

The substance which accelerates the growth in stem is

asked Apr 9, 2014 by sreemathi.v

1 answer

A response to length of day in plants is called

asked Apr 9, 2014 by sreemathi.v

1 answer

The classical experiments in growth were performed by

asked Apr 9, 2014 by sreemathi.v

1 answer

Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Cytokinins help in retention of chlorophyll and delayed senescence in leaves.}\\\text{Reason:The hormone cytokinin stimulates root initiation.}\end{array}$

asked Apr 9, 2014 by sreemathi.v

1 answer

Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Some of the plants flower only in summer whereas some flower in winters.}\\\text{Reason:These flowers require specific photoperiods for flowering.}\end{array}$

asked Apr 8, 2014 by sreemathi.v

1 answer

Given the Assertion and Reason below, Choose one of the following responses :

asked Apr 8, 2014 by sreemathi.v

1 answer

Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:If the long dark period is interrupted by flash of light in xanthium it will not flower.}\\\text{Reason:Xanthium is a long day plant in which case a continuous long light period is essential for flowering.}\end{array}$

asked Apr 8, 2014 by sreemathi.v

1 answer

Given the Assertion and Reason below, Choose one of the following responses

asked Apr 8, 2014 by sreemathi.v

1 answer

Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:The isolated aleurone layer induces amylase activity when Gibberellic acid is added.}\\\text{Reason:Enzyme amylase converts insoluble starch to soluble sugars.}\end{array}$

asked Apr 8, 2014 by sreemathi.v

1 answer

Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:In germinating seeds fats are stored as reserve food material and are rich in glyoxysomes.}\\\text{Reason:Germinating seeds are responsible for the conversion of fats into sugar to provide energy to germinating seeds.}\end{array}$

asked Apr 8, 2014 by sreemathi.v

1 answer

Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:In the actively growing herbaceous plants the axillary buds are generally dormant.}\\\text{Reason:It is because of apical dominane due to the presence of auxins.}\end{array}$

asked Apr 8, 2014 by sreemathi.v

1 answer

Given the Assertion and Reason below, Choose one of the following responses :

asked Apr 8, 2014 by sreemathi.v

1 answer

Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:In plants during water stress and drought conditions ABA plays an important role.}\\\text{Reason:When the ABA is applied exogeneously it promotes stomatal opening.}\end{array}$

asked Apr 8, 2014 by sreemathi.v

1 answer

Given the Assertion and Reason below, Choose one of the following responses :

asked Apr 8, 2014 by sreemathi.v

1 answer

Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:When the cytokinin is applied to the plants it induces senescence.}\\\text{Reason:Cytokinins promote the breakdown of roteins,chlorophyll and nucleic acids.}\end{array}$

asked Apr 8, 2014 by sreemathi.v

1 answer

Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Ethylene is a gaseous phytohormone.}\\\text{Reason:It is responsible for the ripening of many fruits}\end{array}$

asked Apr 8, 2014 by sreemathi.v

1 answer

Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Dry seeds do not germinate.}\\\text{Reason:The most important external factor for seed germination is water.}\end{array}$

asked Apr 8, 2014 by sreemathi.v

1 answer

Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:The pigment cytochrome controls photomorphogenetic responses.}\\\text{Reason:Cytochrome pigment occurs in two photoreversible forms.}\end{array}$

asked Apr 8, 2014 by sreemathi.v

1 answer

Match the words for column I with Column II:In column I are given phytohormones and in column II their functions.

asked Apr 8, 2014 by sreemathi.v

1 answer

Match the words of the two columns :

asked Apr 8, 2014 by sreemathi.v

1 answer

Chloroplast contains maximum quantity of

asked Apr 8, 2014 by sreemathi.v

1 answer

Pigment system is concerned with

asked Apr 8, 2014 by sreemathi.v

1 answer

Chlorophyll is present

asked Apr 8, 2014 by sreemathi.v

1 answer

Photophosphorylation means synthesis of

asked Apr 8, 2014 by sreemathi.v

1 answer

The specific function of light energy in the process of photosynthesis is to

asked Apr 8, 2014 by sreemathi.v

1 answer

The first step in photosynthesis is the

asked Apr 8, 2014 by sreemathi.v

1 answer

Photophosphorylation is the process in which

asked Apr 8, 2014 by sreemathi.v

1 answer

In which of the following process the light energy is converted into chemical energy

asked Apr 8, 2014 by sreemathi.v

1 answer

Our present day view regarding photosynthesis is that it

asked Apr 8, 2014 by sreemathi.v

1 answer

During photosynthesis,$O_2$ is liberated by oxidation of

asked Apr 8, 2014 by sreemathi.v

1 answer

The emperical formula for chlorophyll is

asked Apr 8, 2014 by sreemathi.v

1 answer

The first product of $CO_2$-fixation in $C_3$ plants is

asked Apr 8, 2014 by sreemathi.v

1 answer

The first food substance plants make in photosynthesis is

asked Apr 8, 2014 by sreemathi.v

1 answer

In photosynthesis

asked Apr 8, 2014 by sreemathi.v

1 answer

The oxygen in photosynthesis is released from

asked Apr 8, 2014 by sreemathi.v

1 answer

Emerson effect indicates the existence of

asked Apr 7, 2014 by sreemathi.v

1 answer

Red drop occurs in wave length of

asked Apr 7, 2014 by sreemathi.v

1 answer

Red drop is

asked Apr 7, 2014 by sreemathi.v

1 answer

The number of light quanta required for evolution of one molecule of oxygen is called

asked Apr 7, 2014 by sreemathi.v

1 answer

How much energy is utilised in the synthesis of one molecule of glucose

asked Apr 7, 2014 by sreemathi.v

1 answer

Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Photosynthesis is regarded as an oxidation reduction process.}\\\text{Reason:The transport involves step by step transport of electrons in non-cyclic and cyclic electron transport wherein oxidation of one substance coupled with reduction of another substance takes place.}\end{array}$

asked Apr 7, 2014 by sreemathi.v

1 answer

Dark reaction in photosynthesies is called because

asked Apr 7, 2014 by sreemathi.v

1 answer

The maximum evolution of oxygen is by

asked Apr 7, 2014 by sreemathi.v

1 answer

The process of photophorylation was discover by

asked Apr 7, 2014 by sreemathi.v

1 answer

Regarding the figure : 1. It shows asexual reproduction in sponge 2. Reproductive structures are gemmules. 3. The most common of asexual reproductive structures (in living world) is zoospores which are usually microscopic and non-motile.

asked Apr 4, 2014 by pady_1

1 answer

Choose the odd one out : (on the basis of oestrous and menstrual cycle)

asked Apr 4, 2014 by pady_1

1 answer

Parthenogenesis occurs in all except :

asked Apr 4, 2014 by pady_1

1 answer

Regarding asexual reproductive structures : Match the following & choose the most appropriate option:

asked Apr 4, 2014 by pady_1

1 answer

Asexual reproduction : 1. Cell division is itself a mode of reproduction in Protists and Monerans. 2. Many single-celled organisms reproduce by binary fission, where a cell divides into two halves and each rapidly grows into an adult (e.g., Amoeba, Paramecium). 3. In yeast, the division is unequal and small buds are produced that remain attached initially to the parent cell which, eventually gets separated and mature into new yeast organisms. Regarding 1, 2 and 3 :

asked Apr 4, 2014 by pady_1

1 answer

The gynoecium may consist of a single pistil or may have more than one pistil . When there are more than one, the pistils may be fused together or may be free ___ . Identify A and B:

asked Apr 4, 2014 by pady_1

1 answer

Ask Questions, Get Answers