Which one of the following is opposite part of micropylar end of ovule.

Match List-l with List-II

LIST- I (Population interaction)	LIST- II ( Example)
(A) Parasitism	(I) Herbivores and plants
(B) Commensalism	(II) Human liver fluke
(C) Mutualism	(III) Egret and grazing cattle
(D) Competition	(IV) Lichens

Choose the correct answer from the options given below:

Match List-l with List-II

List-l (Genes of lac Operon)	List-II (Codes for)
(A) i	(I) \( \beta \)-galactosidase
(B) z	(II) Transacetylase
(C) a	(III) Permease
(D) y	(IV) Repressor

Choose the correct answer from the options given below:

In Vallisneria, the pollination is carried by:

Find the odd one out with reference to terrestrial ecosystem:

Identify the microbes producing commercially important organic acids and enzymes from the given options:
(A) Trichoderma polysporum
(B) Streptococcus
(C) Clostridium butylicum
(D) Aspergillus niger
Choose the correct answer from the options given below:

Read the passage carefully and give the answers to the question :
Does the number of species in a community really matter to the functioning of the ecosystem? This is a question for which ecologists have not been able to give a definitive answer. For many decades, ecologists believed that communities with more species, generally, tend to be more stable than those with less species.
According to the International Union for Conservation of Nature and Natural Resources (IUCN) (2004), the total number of plant and animal species described so far is more than 1.5 million.
Which of the following is not a characteristic of a stable biological community?

Select the correct name for the following reaction:
\(\text { Acetone } \xrightarrow{NH_2 NH_3} \text { Hydrazone } \xrightarrow{KOH / \text { ethylenes syreol, Heet }} \text { Propane }+N_2\)

Arrange the following ducts pertaining to male reproductive system starting from seminiferous tubules
(A) Vas deferens
(B) Vasa efferentia
(C) Rete testis
(D) Epididymis
Choose the correct answer from the options given below:

Arrange the following nucleophiles in the decreasing order of their attacking strength :
(A) \(C _6 H _5 COO ^{-}\)
(B) \(CH _3 CH _2 CH _2 COO ^{-}\)
(C) \(CH _3 CH _2 CH _2 CH _2 S^{-}\)
(D) \(CH _3 CH _2 CH _2 CH _2 O ^{-}\)
Choose the correct answer from the options given below :

Solution of the inequality \(\frac{2 x+3}{4 x-5} \geq 0\) is

If the speeds of gamma rays, X-rays and microwaves are \( V_g \), \( V_x \) and \( V_m \), respectively in free space, then the correct relation between them is:

The internal resistance of primary cell is \( 3 \Omega \). It generates a current of \( 0.3 \text{ A} \) in an external resistance of \( 22 \Omega \). The rate at which chemical energy is consumed in providing the current is: