Human beings are
monoecious
dioecius
intersexual
hermaphrodites
Correct Answer :
B. dioecius
Related Questions
In the growing oocyte, the nucleus enlarges in size due to an increase in
Proteins
Nucleoplasm
DNA
RNA
Meroblastic cleavage is found in
man
hen's egg
frog
rabbit
Which of the following do not show parental care over their young ones ?
mammals
lizards
fowls
earwigs
Laternal line system of sense organs present in the skin of tadpole larva
completely disappears during metamorphosis
partialy retained during metamorphosis
partially disappears during later stages of metamorphosis
fully retained in the adult frog
A true coelom is covered by
ectoderm
endoderm
mesoderm
ecto and mesoderm
Antifertilizin is secreted by
fertilized egg
spermatozoa
unfertilized egg
egg membranes
The formation of the neural tube is known as
neurulation
tubulation
crania tion
none of these
Cleidoic eggs are found in
birds
mammals
insects
molluscs
When the eggs are released from the ovary of frogs they are at the
primary oocyte stage
secondary oocyte stage
ootid stage
matured ova stage
The formation, development and matura- j tion of the female gamete is called
ovulation
oogenesis
vitellogenesis
folliculogenesis
Which one has the capacity to reproduce without fertilization of eggs ?
Spider
Crow
Honeybee
Earthworm
In frog's egg the divisoin is
holoblastic
meroblastic
diploblastic
triploblastic
In order to become structurally and functionally a spermatozoan, each spermatid has to undergo a process of differentiation called
spermiation
spermiogenesis
spermatogenesis
androgenesis
The expulsion of completely developed foetus from the uterus is known as
ovuation
placentation
gestation
parturition
The sexual embrage of the male and female frogs is called
copulation
amphimixis
syngamy
amplexus
The substance fertilizin is secreted by
ova
sperm
both and
primary spermatogonia
Embryo sac in a hen's egg is formed by
ectoderm
meso derm
somatic mesoderm and endoderm
splanchnic mesoderm and ectoderm
The first phase in the sexual reproduction of organisms is
spermatogenesis
oogenesis
spermiogenesis
gametogenesis
Grey cresent is present in
zygote of frog
brain of rabbit
eye of frog
retina of cockroach
Blastopore in frogs development occurs in
blastula and opens in blastocoel
blastula and opens in archenteron
gastrula and opens in blastocoel
gastrula and opens in archenteron
The cellular movements during gastrula-tion are called
epiboly
emboly
morphogenetic movements
involution
Spermatoliosis is a process by which
the spermatids differentiate into spermatozoa
primary spermatcyte is tarnsformed into a secondary spermatocyte
spermatogonea complete multiplication phase
secondary spermatocyte extrudes polar bodies
Human beings are
monoecious
dioecius
intersexual
hermaphrodites
Constructive change in the development of frog from tadpole is
disappearance of tail
food habit becoming carnivore
land habit
excretion beocmes mesonephric
Oogonia entering the growth phase of oogenesis is called
primary oocyte
secodnary oocyte
ootid
gonocyte
Which of the following does not show metamorphosis ?
Frog
Housefly
Hydra
Mosquito
If an unfertilized frog's egg is pricked with a micro-needle, it will
die immediately
start dividing
will remain undivided
transform into a tadpole at a faster rate
Metamorphosis is a characteristic feature of
direct ontogenic development
indirect ontogenic development
chordates
embryogenesis in mammals
A freshly unfertilised egg of hen contains
one cell
100 cells
1000 cells
10000 cells
Sexual reproduction in larval condition is known as
paedogamy
autogamy
isogamy
anisogamy