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Earth is protected from ultraviolet radiations by means of

The "packing" tissue found in porifera is called _________.

Which of the following organism is present in most diagnosed cervical cancers?

The animals possessing the following types of germ layers (a and b) are _____________and _____________ respectively.

Which of these data is not needed for a herbarium sheet?

There are two opposing views about the origin of modern man According to one view Homo Erectus in Asia were the ancestors of modern man. A study of variation of DNA, however, suggested African origin of modern man. What kind of observation of DNA variation could suggest this?

As of 2015, the world’s population has touched

Increased use of CFCs in the world is likely to have resulted in which of the following statements.

Match the correct options in reference to Salivary glands :

Splitting of water molecules during light reaction of photosynthesis is associated with

(a) PS I resulting in the release of $O_2$, protons and transfer of electrons to PS II

(b) PS II resulting in release of $O_2$, protons and transfer of electrons to PS I

(c) PS II resulting in release of $O_2$, protons and transfer of electrons to PS II

(d) PS I resulting in the release of $O_2$, protons and transfer of electrons to PS I.

Of the above statements

Most of the energy required by the human body comes from:

While xylem is always open and used for transport of water, phloem is open only when the food needs to be transported. Which of the following reasons supports this statement?

Pickout the incorrect statements regarding sexual reproduction

If the older leaves of a plant shows yellowing and the yield is reduced, then it may be due to the deficiency of:

Chiasmata are first seen in

Which one of the following is not correctly matched?

An example for fluid connective tissue is _____

Mitochondrial cristae are sites of:

A flower which can be divided into two equal halves in only one plane is

The self regulatory check on rate of reproduction is

‘Phenotype’ refers to:

Pituitary gland is located

Which of the following are most suitable indicators of SO2 pollution in the environment?

Chiasmata forms in which of these phases ?

Animals that have adapted themselves to live in deserts are known as

$Z{n}^{2+}$ is an activator of

Study the following table showing the components of water potential of four cells of an actively transpiring plant.

$\begin{array}{ccc}Cell& Solutepotential& Pressurepotential\\ & \left(MPa\right)& \left(MPa\right)\\ A& -0.68& 0.42\\ B& -0.75& 0.36\\ C& -0.83& 0.47\\ D& -0.57& 0.29\end{array}$

Identify the four cells as root hair, cortical cell, endodermal cell (lacking casparian strips) and pericycle cell respectively in the young root (assuming symplastic water flow through them).

Regarding the Assertion and Reason, choose the correct option:

Assertion [A] : Sympathetic and parasympathetic systems have opposing functions.

Reason [R] : The parasympathetic nervous system ‘prepares you’ for action, while the sympathetic system ‘calms you’ down after action.

Linkage prevents

Identify these structures.

Long ribbon-like pollen grains are released underwater by

The reproductive structures of gymnosperms are called

Determination of percentage of crossing over between two linked genes is important in

Which of the following is true about insertional inactivation of the β-galactosidase coding sequence?

During respiration, NADH donates two electrons to the carrier know as ubiquinone. When this happens, ubiquinone:

Which of the following are characteristics of primary immune response?

Which of these is checked for in the M phase checkpoint?

Histone protein synthesis occurs during :

The major pollutant behind the infamous `Bhopal’ leakage was

Match the following

Column -I Column- II

(i) Exine (a) Sporopollenin absent

(ii) Intine (b) Tube cell

(iii) Germ pore (c) Thin continuous layer

(iv) Vegetative cell (d) Fertile cell

(v) Generative cell (e) Thick porous layer

Which of the following processes take place outside the nucleus?

Choose how many of the given statements are not correct about the Tropics?

(i) Greater species diversity compared to Temperate

(ii) Subjected to frequent glaciations in the past

(iii) Great seasonal variations are seen here

(iv) Environment is relatively constant