Homologous & Analogous organs
What are
o
homologous organs?
he organs having common origin but performing different functions
What are
analogous organs?
The organs having different origin but
Why are stem &
performing same functions
leaf tendrils considered as
o All
analogous organsS
tendrils are
structurally and functionally similar irrespective of their orgin
Give 2
examples for homologous organs in plants
Scale leaves of onion/
spines of opuntia Tendrils of cardiospermum/ bulbil of agave
Tendrils of passion flower/ thorns of
Give two pomegranate Tendrils of vitis/ thorns of Carissa
examples of analogous organs in plants
Tendrils of pea & vitis Thorns of
root of carrot
pomegranate/ spines of opuntia Rhizome of ginger/
Cladode/ phylloclade
Which type of evolution gives rise to
homologous organs a. Divergent evolution
Which type of evolution
gives rise to analogous organs a. Convergent evolution
Give 2 examples of homologous Organs in animals ate"um o
What are Xeric animals?
animals that live in dry regions with very little water/ scarcity of water
What are hydric animals?
animals that live in water/ aquatic medium
Define Adaptations?
Modifications/ changes undergone by plants &animals morphologically. Physiologically &
anatomically to suit the habitat
W h a t is the importance ot study ot ecological adaptations in plants & animals?
T o know the effect of pollution, growth, survival of biotic, community, morphological &
anatomical changes to suit the particular habitat
Give 3 adaptive features of frog suitable to aquatic life
What is the importance of the long eyelashes in came! ?
example for a xeric animal
Give an
Give an example
for Hydric animal.
squirrel an example for which adaptation
W h a t is the adaptations seen kangaroo rat to dwell in desert
knees ofcamel have leathery patches?
W h y do
descended in camel?
Why are testis
in aquatic animals.
Name the locomotory organ
organ in aquatic animals.
Name the respiratory
, Pollen tube growth on stigma
Name thetype of pollen grain dehiscence (release) a. Longitudinal & porus mode
dehiscence
2) Whatis the destination of pollen tube ?a. Embryosac of the ovule is the destination
pollen tube.
3) Name the process after which pollen grain germinate a. Pollination
can germinate
4) What is pollen grain pistil compatability? a. The pollen grain of specific plant
on specific stigma of the same species. This is called pollen-pistil compatibility
in the lab to observe pollen tube growth on stigma a.
Name the plants generally used
Hibiscus, Vinca, Datura flower
growth a. Cotton blue
6) Name the stain used to observe Pollen tube
between the
is the role of glycerine in this expt a. It acts as a temporary adhesive
7) What
material& slide
Give
stigma of other species?
reasons
8) Can pollen grains of one plant species germinate on
compatibility
a. No, it is species specific & they exhibit pollen- pistil
?if no give reasons a. It depends on the absorption
9) Are all the pollen tubes of equal length
of nutrient from the stigmatic
surface/ surrounding medium
reach the ovule a. No
10)Do all the pollen tubes
Mitosis
Mitosis is a mode of cell division in which the daughter cells are
1) Define mitosis a.
that occurs in somatic cells of plants &
animals
similar to the parent cell
genetically
somatic cell division
mitosis? a. Equational cell division/
other name for
2) What is the
material used to study mitosis? a. Onion root tip:
3) What is the
Acetocarmine
used to observe stages of mitosis a.
Name the stain
4)
of mitosis a. Karyokinesis & cytokinesis
Mention the 2 major steps
5)
Division of the nucleus is called karyokinesis
What is karyokinesis? a.
6)
What are
o
homologous organs?
he organs having common origin but performing different functions
What are
analogous organs?
The organs having different origin but
Why are stem &
performing same functions
leaf tendrils considered as
o All
analogous organsS
tendrils are
structurally and functionally similar irrespective of their orgin
Give 2
examples for homologous organs in plants
Scale leaves of onion/
spines of opuntia Tendrils of cardiospermum/ bulbil of agave
Tendrils of passion flower/ thorns of
Give two pomegranate Tendrils of vitis/ thorns of Carissa
examples of analogous organs in plants
Tendrils of pea & vitis Thorns of
root of carrot
pomegranate/ spines of opuntia Rhizome of ginger/
Cladode/ phylloclade
Which type of evolution gives rise to
homologous organs a. Divergent evolution
Which type of evolution
gives rise to analogous organs a. Convergent evolution
Give 2 examples of homologous Organs in animals ate"um o
What are Xeric animals?
animals that live in dry regions with very little water/ scarcity of water
What are hydric animals?
animals that live in water/ aquatic medium
Define Adaptations?
Modifications/ changes undergone by plants &animals morphologically. Physiologically &
anatomically to suit the habitat
W h a t is the importance ot study ot ecological adaptations in plants & animals?
T o know the effect of pollution, growth, survival of biotic, community, morphological &
anatomical changes to suit the particular habitat
Give 3 adaptive features of frog suitable to aquatic life
What is the importance of the long eyelashes in came! ?
example for a xeric animal
Give an
Give an example
for Hydric animal.
squirrel an example for which adaptation
W h a t is the adaptations seen kangaroo rat to dwell in desert
knees ofcamel have leathery patches?
W h y do
descended in camel?
Why are testis
in aquatic animals.
Name the locomotory organ
organ in aquatic animals.
Name the respiratory
, Pollen tube growth on stigma
Name thetype of pollen grain dehiscence (release) a. Longitudinal & porus mode
dehiscence
2) Whatis the destination of pollen tube ?a. Embryosac of the ovule is the destination
pollen tube.
3) Name the process after which pollen grain germinate a. Pollination
can germinate
4) What is pollen grain pistil compatability? a. The pollen grain of specific plant
on specific stigma of the same species. This is called pollen-pistil compatibility
in the lab to observe pollen tube growth on stigma a.
Name the plants generally used
Hibiscus, Vinca, Datura flower
growth a. Cotton blue
6) Name the stain used to observe Pollen tube
between the
is the role of glycerine in this expt a. It acts as a temporary adhesive
7) What
material& slide
Give
stigma of other species?
reasons
8) Can pollen grains of one plant species germinate on
compatibility
a. No, it is species specific & they exhibit pollen- pistil
?if no give reasons a. It depends on the absorption
9) Are all the pollen tubes of equal length
of nutrient from the stigmatic
surface/ surrounding medium
reach the ovule a. No
10)Do all the pollen tubes
Mitosis
Mitosis is a mode of cell division in which the daughter cells are
1) Define mitosis a.
that occurs in somatic cells of plants &
animals
similar to the parent cell
genetically
somatic cell division
mitosis? a. Equational cell division/
other name for
2) What is the
material used to study mitosis? a. Onion root tip:
3) What is the
Acetocarmine
used to observe stages of mitosis a.
Name the stain
4)
of mitosis a. Karyokinesis & cytokinesis
Mention the 2 major steps
5)
Division of the nucleus is called karyokinesis
What is karyokinesis? a.
6)
