Practice for board Eaxm
BATC-A
Q. 4. Spotting …
(A) floral adaptations for wind pollination. Maize plant.
1) Stamens possess long filaments. Anthers are versatile.
2) Pollen grains are produced
in large number to compensate for their wastage.
B) Rate of transpiration by four leaf experiment.
B- leaf is vaselined on its lower surface and transpiration takes place only from the upper surface which is negligible. This leaf also remains turgid and green like the A leaf.
C- leaf is vaselined on its upper surface, which contains less number of stomata or no stomata. The transpiration takes place from the lower stomatal surface, and the leaf shrivels to a large extent.
(C) morphological adaptations. aquatic plants= Hydrilla,
1) Hydrilla is a submerged hydrophyte rooted at the bottom.
2) The
arrangement of leaves is in whorls which allows free movement of water
currents
D) permanent slide of T. S. testis.
1) Internally it is covered by tunica vascularis formed by capillaries.
2) Sperm bundles get attached to Sertoli cells
with their heads.
3) Sertoli cells provide nourishment to the sperms
E) The given Karyotype is Turners syndrome
To diagnose Turner
syndrome, doctors use a special blood test that looks at chromosomes, called a
karyotype test Results that indicate TS show only one
X chromosome instead of two X chromosomes, with a total of 45 chromosomes
instead of the usual 46.
F) The disease is Malaria-Plasmodium.
1.Use a mosquito net over the bed if your bedroom is not air-conditioned or screened.
2.Spray
an insecticide or repellent on clothing, as mosquitoes may bite through thin
clothing.
G) meiosis in the given slide is Leptotene-
Chromosomes appears like long, thin, beaded threads.
In
the leptotene stage the
chromosomes divide longitudinally to form pairs of sister chromatids.
H) It is Xeric adaptations in Camel-camelus spp
1.It is a xerocoles animal adapted to the desert conditions.
2.It excretes concentrated urine in order to conserve water.
3 Flat and wide feet help it to walk easily over soft sand.
I) It is part an Embryo sac in V.S.of ovule.
Egg Apparatus: diploid zygote to develops into an embryo.
Polar nuclei: The two polar nuclei fuse to form single diploid secondary nucleus.Antipodal cells: These are nutritive cell.
J) The given pedigree chart is Widows peak
Widow's peak is a V-shaped hair line across the forehead.
It
is a dominant autosomal trait. both homozygous dominant
(WW ) and heterozygous (Ww) individuals have widow's peak, while homozygous
recessive (ww) individuals have straight hair line.
BATCH-B
Q. 4. Spotting
A) Floral adaptations for Insect pollination in Salvia plant.
Flowers are bisexual attractive and have bright coloured petals. The larger lip encloses style and stigma. The fertile anther lobe is at the tip of longer arm.
B) . Identify and comment on. Imbibition of seeds Raisins.
The seeds of raisins soaked in water show change in their volume showing swollen structure and seed coat/ raisins shows softening The seeds swell up when soaked in water due to imbibition and endosmosis.
C) its morphological adaptations in xeric habitats. In Opuntia dillenii.
1. It is a succulent (drought resisting or enduring) xerophytes
2. Phylloclades are with many nodes (areoles) and internodes. The areoles have one or more spines which represent the modified leaves of axillary branch.
D) It is permanent slide of T. S. of ovary
1) Initially a single layer offollicular cells around each oocyte is seen. It is primordial follicle.
2) The primordial fallicle develops into the primary
follicle which is surrounded by a layer of follicular cells.
E) The syndrome from to given Karyotype is Klinfelters syndrome
Klinefelter Syndrome (47, XXY) is a chromosomal variation in males in which one e Taller than average stature.
After puberty, less muscle and less facial and body hair compared with other extra X chromosome is present, resulting in a 47,XXY karyotype,
F)The disease is Amoebiosis-Entamoeba histolytica .
Washing hands with soap and water after every use of a toilet. Maintain the proper disposal of sewage. Drink boiled water or sealed water when traveling.
G) The stage of meiosis in the given slide is Anaphase-I
i. It is an important stage of meiosis-I, as reduction division takes place in this stage
ii. It results in the separation and dragging of recombined homologous
chromosomes towards opposite poles .
H) its aquatic adaptations In Animals. –Rohu-labeo rohita
1.Body of fishes is stream-lined and laterally compressed to reduce friction and to allow swift passage in water while swimming.
2.It respires by gills which are specialized breathing organs to use gases dissolved in water.
I) the part isRetina in Eye.
The retina is a layer of photoreceptors cells and glial cells within the eye that captures incoming photons The receive light that the lens has focused, convert the light into neural signals, and send these signals on to the brain for visual recognition.
J) The given specimen of Drosophila .
white eye colour is recessive X-linked trait while red eye colour is dominant. Males have dark, rounded genitalia at the tip of their abdomen, whereas females have light, pointed genitalia.
Drosophila has a red-brown eye color caused by the presence of two classes of
pigments, pteridines (red) and ommochromes (brown)
BATCH-C
Q. 4. Spotting……………………
A) Emasculation:
1 )The removal of stamens from anther is called emasculation.
2)which behaves as a
female parent is selected
B) Separation
of plant pigments by paper chromatography
From loaded spot up to the top the sequence is;
chlorophyl (yellowish green), chlorophyll-a (bluish green), xanthophylls
(yellow) and carotene (orange)
C) its morphological adaptations in aquatic habitats in Typha.
1. It is an amphibious and anchored hydrophyte which grows in marshy places or shallow wate adventitious roots and emergent leaves, coming out of
2.
The leaves show the presence of mechanical tissue also and hence they are able
to stand ere They have cuticle and stomata on the emergent part.
D) It is
permanent slide of V. S. of
blastula .
(1) The outermost layer of small flattened cells is called trophoblast.
(2) The inner
cell mass further develops into proper embryo.
E) Identify and comment on the syndrome from to given Karyotype- Down syndrome.
Down syndrome karyotype is formerly called
trisomy 21 syndrome, human male, 47,XY,+21. Hence the karyotype will show 45 autosomes and XY for a male child.
F) It is Disease – Ascariasis.
1. Body is elongated, cylindrical in shape, creamy white or pinkish in colour.
2. Body is covered with cuticle.
Symptoms: 1. The disease caused by Ascaris is called ascariasis.
2. The common symptom is vague abdominal pain.
G) It is stage of meiosis–Metaphase-I
i. An imaginary line (Equatorial plane) develops at the centre of the cell.
ii. Members of each bivalent are connected to only one of the two poles
but opposite poles .
H) It
is Xeric Adaptations In Animals -Kangaroo rat (Dipodomys spp)
1. It is a Xerocoles rodent, which avoids heat by adopting nocturnal habits.
2. It goes into a 'move-freeze' mode which reduces predation at night.
I) Name the part indicated by the marker and enlist
its functions Model- Ear.-Eardrum
The tympanic membrane
is also called the eardrum.
J) the given
pedigree chart is Rolling of toungue.
The rolling of tongue is the ability of a person to
roll the tongue inwards in 'U' shaped The
inability to roll the tongue, is caused by autosomal recessive alle 'a'. Both homozygous
dominants (AA) and heterozygous (Aa) individuals are able to roll the tongue
BATCH-D
Q. 4. Spotting
A) It is step of hybridization -bagging .
1) It is step of hybridization
2)Bagging is followed by tagging in which a tag bearing the name of the plant, date of emasculation, etc, it is tied to the emasculated plant .
B) Rate of transpiration by four leaf experiment.
C- leaf is vaselined on its upper surface, which contains less number of stomata or no stomata. The transpiration takes place from the lower stomatal surface, and the leaf shrivels to a large extent.
D -leaf is not vaselined and both the surfaces transpire freely releasing much water.
This experiment proves that the rate of stomatal transpiration is fairly higher than the cuticular transpiration.
C) Its morphological adaptations in xeric habitats.-Acacia arabica
1) It is well branched. The older parts of stem are covered by thick bark
2) Leaves are bipinnately compound. Leaflets are small in size
D) It is permanent slide of T. S. testis.
1) Externally an incomplete peritoneal covering called tunica vaginalis is present.
2) The testis consists oJ numerous seminiferous tubules.
E) The given Karyotype is Turners syndrome
Turner syndrome can cause a variety of medical and developmental problems, including short height, failure of the ovaries to develop and heart defects.
Results that indicate TS show only one X chromosome instead of two X chromosomes, with a total of 45 chromosomes instead of the usual 46.
F) The disease an is .-Ringworm-Trichophyton spp
Change your socks and underwear at least once a day.
Don’t share clothing, towels, sheets, or other personal items with someone who has ringworm. Wash your hands with soap and running water after playing with pets.
Microsporum audouinii is commonly called ring worm.
G) It is a stage of meiosis in the given slide.is Metaphase-II
i. In this stage, an imaginary line develops forming the equatorial plane which is at right angle to the previous division.At the end spindle formation takes place.
H) Its aquatic adaptations. In animal Dolphin-Delphinus spp
i. It has a backward curving dorsal side and dorsal fin. Snout is beak like.
ii. The position of nostrils near the top of the head, facilitates easy breathing when animal reaches the surface of water for breathing.
I) Name the part indicated by the
marker and enlist its functions Model-
brain.-parietal lobe.
The
parietal lobe is vital for sensory perception and integration,
including the sight, touch, and smell.
J) The given specimen of Drosophila .
Males have dark, rounded genitalia at the tip of their abdomen, whereas females have light, pointed genitalia.
Drosophila has a red-brown eye color caused by the presence of two classes of pigments, pteridines (red) and ommochromes (brown)
BATCH-E
(A) floral adaptations for wind pollination. Maize plant,
1) Flowers are small, numerous and inconspicuous.
2) They are unisexual,
odourless and nectarless .
B) Rate of transpiration by four leaf experiment.
A- leaf, which is vaselined on its both the surfaces, looks fresh and green, as no surface transpires.
B- leaf is vaselined on its lower surface and transpiration takes place only from the upper surface which is negligible. This leaf also remains turgid and green like the A leaf.
(C) morphological adaptations. aquatic plants= Hydrilla
1) Hydrilla is a submerged hydrophyte rooted at the bottom.
(2) Roots are poorly developed. They are unbranched. . Root hairs are absent.
D) It is permanent slide of T. S. of ovary
1) The ovary shows a compact structure, which consists of inner medulla and outer cortex.
(2) The medulla contains connective tissue called
stroma. The cortex is lined by germinal epithelium.
E) The syndrome from to given Karyotype is Klinfelters syndrome
Klinefelter Syndrome (47, XXY) is a chromosomal variation in males in which
one e Taller than average
stature.
Longer legs, shorter torso
and broader hips compared with other boys.
F)The disease is Amoebiosis-Entamoeba histolytica
Washing hands with soap and water after every use of a toilet.Maintain the proper disposal of sewage. Handle soiled diapers carefully.
Drink
boiled water or sealed water when traveling.
G) It is stage of meiosis–Metaphase-I
i. An imaginary line (Equatorial plane) develops at the centre of the cell.
ii. The pair of chromosomes (Bivalents) arranged at the plane in such a
way that they lie equidis on either side of plane, their arms towards the
equator and centromere towards the pole.
H) It is Xeric Adaptations In
Animals -Kangaroo rat (Dipodomys
spp)
1. It is a Xerocoles rodent, which avoids heat by adopting nocturnal habits.
2. It seals its burrow by day to keep its chamber moist.
I) Name the part indicated by the marker and enlist
its functions Model- brain.-parietal
lobe
The parietal lobe is vital for sensory perception and integration, including the management of taste, hearing, sight, touch, and smell.
J) The given specimen of Drosophila .
white eye colour is recessive X-linked trait while red eye colour is
dominant.
In Drosophila, normal wings (+) are dominant to vestigial wings (vg) and the presence of eyes (+) is dominant to being eyeless (ey).