Identify the hormone releasing IUD.

Which of the following is a part of detritus food chain?

In water hyacinth, pollination is carried out by -
(A). Wind
(B). Water
(C). Insects
(D). Animals
Choose the correct answer from the options given below:

Read the following passage carefully and answer the given questions.
Biofertilisers
Biofertilisers are organisms that enrich the nutrient quality of the soil and their main sources are bacteria, fungi and cyanobacteria. You have studied about the nodules on the roots of leguminous plants formed by the symbiotic association of Rhizobium. These bacteria can fix atmospheric nitrogen into organic forms. Other bacteria can also fix atmospheric nitrogen while free-living in the soil (examples Azospirillum and Azotobacter). Fungi are also known to form symbiotic associations with plants (mycorrhiza). Many members of the genus Glomus form mycorrhiza. Plants having such associations show other benefits also, such as resistance to root-borne pathogens, tolerance to salinity and drought, and an overall increase in plant growth and development. Cyanobacteria are autotrophic microbes widely distributed in aquatic and terrestrial environments many of which can fix atmospheric nitrogen, e.g. Anabaena, Nostoc, Oscillatoria, etc. In paddy fields, cyanobacteria serve as an important biofertiliser. Blue green algae also add organic matter in to the soil and increase its fertility. Currently, in our country, a number of biofertilisers are available commercially in the market and farmers use these regularly in their fields to replenish soil nutrients and to reduce dependence on chemical fertilisers.
Nostoc is an example of :

Read the passage carefully and answer the questions based on the passage:
Species diversity on earth is not uniformly distributed. It is generally highest in the tropics and decreases towards the poles. Earth's fossil history reveals the incidences of mass extinctions in the past. Earth's rich biodiversity is vital for the very survival of mankind. It is believed that communities with high diversity tend to be less variable and more productive. The reasons of conserving biodiversity are narrowly utilitarian, broadly utilitarian and ethical. Biodiversity conservation may be in-situ as well as ex-situ.
Which of the following hot spots does not cover India's biodiversity regions?

Which of the following components were taken by S.L. Miller in a closed flask for his experiment on the origin of life?
(A) CH₄
(B) NH₃
(C) CO₂
(D) Water vapours
Choose the correct answer from the options given below:

Which of the following is only composed of exons?

The halide which will undergo \(SN ^2\) reaction easily:

Select the correct increasing order of conductivity of the given complexes in their solution
(A) \(\left[ Co \left( NH _3\right)_6\right] Cl _3\)
(B) \(\left[ Cr \left( NH _3\right)_5 Cl \right] Cl _2\)
(C) \(\left[ Co \left( NH _3\right)_4 Cl _2\right] Cl\)
(D) \(\left[ Co \left( NH _3\right)_3 Cl _3\right]\)
Choose the correct answer from the options given below:

In the expression of Gauss's Law.
\( \oint \vec{E} \cdot d\vec{s} = \frac{q}{\epsilon_0} \)
(A) The electric field on LHS is only due to the charges inside the Gaussian surface.
(B) The electric field on LHS is due to charges inside and outside the Gaussian surface.
(C) The electric charge on RHS represents all the charges inside and outside the Gaussian surface.
(D) The electric charges on RHS represent only the charges outside the Gaussian surface.

In a kilometer race \(P\) runs at \(10 m / sec , Q\) runs at \(5 m / sec\) then which of the following statement \(( s )\) is \(/\) are correct?
(A) \(P\) wins the race in 100 sec
(B) Q wins the race in 100 sec
(C) P defeats Q by 500 m
(D) Q defeats P by 500 m
Choose the correct answer from the options given below :

Arrange the phases of the menstrual cycle according to their occurrence.
(A) Follicular Phase
(B) Menstruation
(C) Luteal Phase
(D) Ovulation
Choose the correct answer from the options given below:

For transmitting a modulated signal of wave length \( \lambda \), the antenna should have minimum size: