Increase in concentration of the toxicant at successive tropic levels is known as
biomagnification
biodeterioration
biotransformation
biotransformation
A.
biomagnification
Biomagnification is the sequence of processes in an ecosystem by which higher concentrations of a particular toxicant, such as the pesticide or heavy metal are reached in higher organisms of the food chain, generally through a series of prey-predator relationships.
Most animals that in deep oceanic water are
primary consumers
secondary consumers
tertiary consumers
tertiary consumers
If you suspect major deficiency of antibodies in a person, to which of the following would you look for confirmatory evidence?
Fibrinogin in plasma
Serum albumins
Haemocytes
Haemocytes
The DNA molecule to which the gene of interest is integrated for cloning is called
Transformer
Vector
Template
Template
The UN conference of Parties on climate change in the year 2012 was held at
Durban
Doha
Lima
Lima
Coconut water from a tender coconut is
Immature embryo
Free nuclear endosperm
Innermost layers of the seed coat
Innermost layers of the seed coat
Which of the following layers in an antral follicle is acellular?
Granulosa
Theca interna
Stroma
Stroma
During ecological succession
the gradual and predictable change in species composition occurs in a given area.
the establishment of a new biotic community is very fast in its primary phase.
the number and types of animals remain constant.
the number and types of animals remain constant.
The introduction of t-DNA into plates involves
Infection of the plant by agrobacterium tumefaciens
Altering the pH of the soil, then heat-shocking the plants
Exposing the plates to cold for a brief period
Exposing the plates to cold for a brief period
Which one of the following events in not associated with ovulation in human female?
Decrease in oestradiol
Full development of Graafian follicle
Release of secondary oocyte
Release of secondary oocyte
