The mature embryo sac of an angiosperm is :

The construction of the first recombinant DNA emerged from linking a gene encoding antibiotic resistance with a native plasmid of __________.

Bacillus thuringiensis produces Bt toxin crystals it does not kill the bacterium itself as the toxin is in the:

Which of the following hormones are secreted by placenta?
(A) hCG
(B) hPL
(C) Estrogens
(D) Progestogens
(E) Relaxin
Choose the correct answer from the options given below:

Baculoviruses are pathogens that attack -

The detritus food chain (DFC) has at the first tropic level.

Maximum transgenic animals existing are:

Read the given passage and answer the following questions:
Secondary treatment or biological treatment: The primary effluent is passed into large tanks where air is pumped into it. This allows vigorous growth of aerobic microbes. While growing, these microbes consume the major part of the organic matter in the effluent. This significantly change the BOD (biochemical oxygen demand) of the effluent. The effluent in then passed into a tank a small part of the sludge is pumped back into the aeration tank to serve as the inoculum. The remaining major part of the sludge is pumped into large tanks called sludge digesters. Here, other kinds of bacteria grow anaerobically in the sludge. The biogas produced can be used source of energy as it is inflammable. The effluent from the secondary treatment plant is generally released into natural water bodies like rivers and streams.
The greater the BOD of water

If A is a square matrix of order 3, B = kA and |B| = x|A| then,

Two particles x and y having equal charge, after being accelerated through the same potential difference, enter a region of a uniform magnetic field. They describe circular paths of radii \( R_1 \) and \( R_2 \), respectively. The ratio of the mass of x to that of y is:

The rate of production of organic matter during photosynthesis is defined as -

Which of the following statements are correct about alkyl halides :
A. Alkyl halides are polar so they are soluble in water
B. RX on reaction with alc.KOH give alkenes
C. RX on reaction with \(AgNO_2\) give RONO
D. \(S_N1\) proceeds with inversion in configuration
E. R-X have higher boiling point than parent alkanes
Choose the correct answer from the options given below :

Arrange the given structures in correct sequence of transcription unit when we move from left to right?
(A) Terminator
(B) Promoter
(C) Structural gene
(D) Transcription start site
Choose the correct answer from the options given below: