Cessation of menstrual cycle in women is called
menopause
lactation
ovulation
parturition
A.
menopause
Menopause is the permanent cessation of ovulation and menstrual cvcle in women.
Lactation is the process of milk production by mammary glands.
Ovulation is the release of ovum or oocyte from mature follicle of vertebrate ovary.
Expulsion of foetus from uterus at the end of pregnancy in the mammals is called parturition.
In sugarcane plant, 14CO2 is fixed in a malic acid, in which the enzyme that fixes CO2 is
ribulose phosphate kinase
fructose phosphatase
ribulose biphosphate carboxylase
phosphoenol pyruvic acid carboxylase
Which one of the following is wrong in relation to photorespiration?
It is a characteristic of C4 -plants
It is a characteristic of C3 -plants
It occurs in chloroplasts
It occurs in daytime only
Stomata of CAM plants
open during the night and close during the day
never open
are always open
open during the day and close at night
Chlorenchyma is known to develop in the
spore capsule of a moss
pollen tube of Pinus
cytoplasm of Chlorella
mycellium of a green mould such as Aspergillus
Boron in green plants assists in
photosynthesis
sugar transport
activation of enzymes
acting as enzyme cofactor
Barr-body in mammals represents
one of the two X-chromosomes in the cells
all heterochromatin of male and female cells
Y-chromosome of male
all heterochromatin of female cells
Discontinuous variations are
essential features
acquired character
non-essential changes
heritable changes
