Acid rain is caused by increase in the atmospheric concentration of
A.
Acid rain is caused by increase in the atmospheric concentration of SO2 and NO2. These mix with water vapour to form sulphuric acid (H2SO4) and nitric acid (HNO3) respectively which falls on earth in the form of acid rain.
In which of the following interactions both partners are adversely affected?
Competition
Predation
Parasitism
Parasitism
Match the following list of microbes and their importance:
(a) | Sacharomyces cerevisiae | (i) | Production of immunosuppressive agents |
(b) | Monascus purpureus | (ii) | Riperuing of Swiss cheese |
(c) | Trichoderma polysporum | (iii) | Commercial production of ethanol |
(d) | Propionibacterium sharmanii | (iv) | Production of blood cholesterol lowering agents |
Codes
A B C D
3 4 1 2
A B C D
4 3 2 1
A B C D
4 2 1 3
A B C D
4 2 1 3
A pleiotropic gene
is expressed only in primitive plants.
is a gene evolved during Pliocene
controls a trait only in combination with another gene
controls a trait only in combination with another gene
Grafted kidney may be rejected in a patient due to
Humoral immune response
Cell-mediated immune response
Passive immune response
Passive immune response
Which one of the following fruits is parthenocarpic?
Brinjal
Apple
Jackfruit
Jackfruit
Which of the following diseases is caused by a protozoan?
Syphilis
Influenza
Babesiosis
Babesiosis
Male gametophyte in angiosperms produces
Two sperms and a vegetative cell
Single sperm and a vegetative cell
Single sperm and a two vegetative cells
Single sperm and a two vegetative cells
Satellite DNA is important because it
codes for proteins needed in cell cycle.
shows high degree of polymorphism in population and also the same degree of polymorphism in an individual, which is heritable from parents to children.
does not code for proteins and is same in all members of the population.
does not code for proteins and is same in all members of the population.
Eutrophication of water bodies leading to killing of fishes is mainly due to non-availability of
food
light
essential minerals
essential minerals