BIOLOGY
12th CLASS GUESS PAPER- 2022
SHORT QUESTONS
Ø
Differentiate between
osmoconformers and osmoregulators
Ø
What is a renal failure?
Ø
Give the characteristics of
xerophytes plants.
Ø
Why leaves are said to be
excretophores.
Ø
Sketch Urea cycle.
Ø
Give difference between
protonephridium and Metanephridium.
Ø
What is the function of Bile?
Ø
What is counter current
multiplier mechanism?
Ø
What is Lithotripsy? Name
its common type.
Ø
Define endotherms and ectoderms.
Ø
Write two characteristics
of collenchyma’s tissue.
Ø
What is a ligament?
Ø
What do you know about
sleep movement in plants?
Ø
What is plugins? What is
its function?
Ø
What is difference between
compact and spongy Bone?
Ø
Write down the difference
between Tet any and Tetanus.
Ø
What is antagonistic action
of Muscles?
Ø
What is jet propulsion?
Explain with an example.
Ø
Differentiate between Plant
grade and digitigrade mammals.
Ø
How do plants respond to
environmental stresses?
Ø
Give are commercial
applications of Gibberellins.
Ø
Differentiate active
membrane potential from resting membrane potential.
Ø
Differentiate between CNS
and PNS.
Ø
List the four types of
hormones with examples.
Ø
Define Habituation with an
example.
Ø
What do you mean by verbalization?
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What are Apomixes?
Ø
Compare Oviparous and
Viviparous.
Ø
How external fertilization
differs from internal fertilization?
Ø
Explain Estrous cycle.
Ø
Explain the role of
gonadotropins in human female.
Ø
1Define apical and
intercalary meristems.
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2. Differentiate between
primary growth and secondary growth.
Ø
3. Define growth
correlations.
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4. How aging can be slowed
down?
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5. What are neoplasms?
Ø
Difference between
teratology and teratogens.
Ø
How many chromosomes are
found in sugarcane and mouse?
Ø
Define Promoter?
Ø
Differentiate between sense
and antisense strand.
Ø
Define Codon and anticodon.
Ø
What are point mutations?
Give examples.
Ø
What is the function of
mitotic apparatus?
Ø
How cytokinesis takes pale
in plants?
Ø
Write any two difference
between normal cells and cancer cells?
Ø
What are symptoms of
Turner’s syndrome?
Ø
Differentiate apoptosis
from necrosis.
Ø
Define is allele and gene?
Ø
Define Co-dominance with
one example.
Ø
What is Epistasis? Give one
example.
Ø
Differentiate between
linkage and linkage group.
Ø
Differentiate between Sex
chromosomes and autosomes.
Ø
What is Multifactorial
trait? Give an example.
Ø
What are restriction
endonucleases?
Ø
What do you know about
palindromic sequence? Give example.
Ø
Give any two requirements
to produce recombinant DNA.
Ø
Define genomic library.
Ø
Give difference between
Ex-Vivo and In-vivo gene therapy.
Ø
What is gene pharming?
Explain its importance.
Ø
Define Neo- Darwinism.
Ø
Define vestigial organs.
Give examples from animals.
Ø
Define Hardy- Weinberg
theorem. Give its formula.
Ø
Differentiate between
endangered and threatened species.
Ø
How man is responsible to
increase the number of endangered species?
Ø
What do you know about the
term ecosystem?
Ø
Differentiate between
Autecology and Synecology.
Ø
Define Grazing. What are
effects of overgrazing?
Ø
Differentiate between
Ectoparasite and Endoparasit.
Ø
Write limnetic zone?
Mention its life.
Ø
What is tundra? Where is it
found in Pakistan?
Ø
Define soil and give its
basic constituents.
Ø
Define wild life. Give its
important role.
Ø
Differentiate between
deforestation and afforestation.
Ø
What is Ozone Layer?
Ø
Name some pathogenic and
congenital diseases.