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A long string having a cross-sectional area $0.8{\text{mm}}^2$ and density $12.5{\text{g/cm}}^3$, is subjected to a tension of $64\text{N}$ along the $x-$ axis . One end of this string is attached to a vibrator, which is vibrating in a transverse direction. Find the speed of the wave travelling on the string.

In which phase do the primary oocytes get arrested during early foetal development?

In a population interaction, if the stronger partner (fit) survives and the weaker partner perishes, the interaction is

A blackbody of surface area 1 $c{m}^2$ is placed inside an enclosure. The enclosure has a constant temperature 27${}^{\circ }$ C and the blackbody is maintained at 327 ${}^{\circ }$ C by heating it electrically. What electric power is needed to maintain the temperature?$\sigma =6.0\times {10}^{-8}W/m^2-K^4$.

If a cross mode between AA and aa, progency will be:

Which of the following is a Biosphere Reserve?

Consider the following graphs and choose the correct option w.r.t. differential WBC count in blood of healthy adult individual.



निम्नलिखित आरेखों पर विचार कीजिए तथा स्वस्थ वयस्क व्यक्ति के रक्त में डिफरेन्शियल WBC संख्या के संदर्भ में सही विकल्प का चयन कीजिए।

Red root is another name of:

Mychorrhiza is the symbiosis between ________ .

The magnetic field due to a current carrying circular loop of radius 3 cm at a point on its axis at a distance of 4 cm from the centre is 54 $\mu$T. The magnetic field (in $\mu$T) at the centre of the loop will be

Regarding assertion and reason, select the correct option

Assertion [A]: Phenylketonuria or PKU is a disease that can affect both females and males

Reason [R]: The individual should be homozygous recessive to get PKU

Which of the following is the correct order of spermatogenesis?

Which one is correct?

The direction of light striking the retina will be-

Which of the following is the main reason for the steep decrease in the Giant Panda population?

Which among the following statements explains why tropical regions have a richer biological diversity than other regions?

Nucleosome contains:

The rate of transcription in plants is dependent upon

Identify A & B in given graph

Asexual reproduction by non motile spores is observed in

Germplasm collection is necessary because

Assertion: Blood coagulates in injured blood vessels.

Reason: Uninjured blood vessels release an anticoagulant heparin.

Which of the following is/are true about ABO blood antigens?

1. They are present on mitochondrial surface of WBCs.

2. They are found free floating in the cytoplasm of WBCs.

3. They are present on the surface of RBCs.

4. They are present in RBC cytoplasm.

Regarding the assertion and reason, choose the correct option.

Assertion [A]: The filtrate that moves from the PCT to the loop of Henle, remains isosmotic.

Reason [R]: About 50% of urea is reabsorbed.

The surface of an echinoderm body, where the mouth is formed is termed as ____.

Which of the following is the largest cell of the female gametophyte?

Transpiration is manifestation of

Which of these is the class that the domestic dog belongs to?

Alien species invasion happens when ________.

What ultimately occurs during respiration is:

The smaller glial cells that forms the first line of defense and immunity of nerve cells are called as _____.

Which of the following type of ecosystem is expected in an area where evaporation exceeds precipitation, and mean annual rainfall is below 100mm:

A population with natality equal to mortality is:

Which of the following cannot be determined by observing a floral diagram?

In which of the following underground stem modifications, food is not stored in the stem?

Which one of the following feature is common to Prokaryotes and Eukaryotes?

A haploid set of all the genes present in a gamete is called:

Apical meristems are found at tips of

Atrio-ventricular septum is made of _______________ tisue:

In which of the following, mucopolysaccharides are NOT present?

Which of the following is not true about tardigrades?

The primary lymphoid organ is

Sclerenchymatous bundle sheath is present in:

Which of the following is found only in birds?