The arrangement of the nuclei in a normal embryo sac in the dicot plants is
2+4+2
3+2+3
2+3+3
2+3+3
B.
3+2+3
In angiosperms (dicots), the Polygonum type of embryosac is most common. In this embryosac, the arrangement of the nuclei is 3+2+3 i.e., 3 in antipodal cells, 2 as polar nuclei (which later fuse and form a diploid secondary nucleus); and 3 in egg appratus (2 in synergids and 1 in egg cell).
Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and municipal waste water into natural surface water, is:
< 3.0 ppm
< 10 ppm
< 100 ppm
< 100 ppm
Withdrawal of which of the following hormones is the immediate cause of menstruation?
Eastrogens
FSH
FSH-RH
FSH-RH
An enzyme that can stimulate germination of barley seeds is
α-amylase
lipase
protease
protease
In a cereal grain the single cotyledon of embryo is represented by
coleorhiza
scutellum
prophyll
prophyll
Triticale, the first man-made cereal crop, has been obtained by crossing wheat with
rye
pearl millet
sugarcane
sugarcane
In order to obtain virus-free plants through tissue culture the best method is
protoplast culture
embryo rescue
anther culture
anther culture
HIV that causes AIDS, first starts destroying
B-lymphocytes
leucocytes
thrombocytes
thrombocytes
Sickle cell anaemia has not been eliminated from the African population because
it is controlled by recessive genes
it is not a fatal disease
it provides immunity against malaria
it provides immunity against malaria
Both sickle cell anaemia and Huntington's chorea are
bacteria-related diseases
congenital disorders
pollutant-induced disorders
pollutant-induced disorders
