Which part of the insect is damaged by active toxin of Bacillus thuringiensis?

Read the following paragraph and answer the given questions.
Bio-fertilisers are organisms that enrich the nutrient quality of the soil like cyanobacteria, while there are organisms that help to control plant diseases and pests. The very familiar beetle, the ladybird and dragonflies are useful to get rid of aphids and mosquitoes, respectively. An example of microbial biocontrol agents that can be introduced to control butterfly caterpillars is certain bacteria, which are available in sachets in the form of dry spores. These spores are mixed with water and sprayed onto vulnerable plants. Trichoderma species that are very common in the root ecosystem, are very effective biocontrol agents of several plant pathogens.Baculoviruses attack insects and other arthropods. Usage of these viruses is desirable when an ecological sensitive area is being treated.
Trichoderma is a/an:

Match List I with List II

LIST I	LIST II
A. Mucus lining	I. Physiological barrier
B. Acid in stomach	II. Cellular barrier
C. PMNL-neutrophils	III. Physical barrier
D. Interferons	IV. Cytokine barrier

Choose the correct answer from the options given below:

Match List I with List II

List - I	List - II
(A) Convergent evolution	(I) Speciation
(B) Divergent evolution	(II) Analogous organs
(C) Adaptive radiation	(III) Homologous organs
(D) Natural selection	(IV) Australian marsupials

Choose the correct answer from the options given below:

In lac operon, a structural gene is-

Observe the figure and answer the following:


What kind of mitotic divisions occur in the nuclei before the formation of embryo sac?

A nematode, Meloidogyne incognitia infects the roots of _______ and causes a great reduction in yield.

In an experiment on the photoelectric effect, the slope of the cut-off voltage versus frequency of the incident light gives

If the points (-1,-1,2), (2, m, 5) and (3, 11, 6) are collinear, then m equals

Vitamin B12 is a coordination compound of _______

Area of the region bounded by the curve \(y^2=4 x, y\)-axis and the line \(y=3\) is equal to:

If we reject the null hypothesis when it is true, we might be making

A swimmer whose speed in swimming pool is 5 km/h, swims between two points in a river and returns back to starting point. He took 20 minutes more to cover the distance upstream than to cover downstream. If the speed of stream is 2 km/h, then the distance between two points is