Download 11th-Biology-_-19.09.2016 - Anuvrat Vidhyalaya Senior

ANUVRAT VIDHYALAYA (CBSE) SCHOOL
“SushwaniBagh”, Kalanipakkam, Pin- 635809
ACADEMIC YEAR -2016-17
Answer Key
Standard
Subject
Time
Teacher
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:
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XI
BIOLOGY
2-30 hrs
D.G.P
Name of the Student _________________
Date: 19.09.2016
1.Kingdom
2.methanemakres
3.phyllotaxy is the arrangement of leaves on a stem or a branch
4.rhizome,bulb,corm,tuber
5.collenchyma
6.simple and compound leaves
7.phloem
8. Robert hooke
section B
1.RER - rough endoplamic reticulum
SER –smooth endoplasmic reticulum
2. lenticels are mass of loosely packed,thinwalled.dead cells that allow exchange of gases through the cork between the
inner living cells and atmosphere
3.nuclear pores are tiny apertures present in the nuclear membrane.
help in the exchange of materials and molecules between nucleus and cytoplasm
4. meristematic tissue are present in growing regions of the plant for example the root tip the shoot tip and cambium
Types :apical meristem lateral meristem and intercalary meristem
5. The different components of phloem are- sieve tubes, companion cells, phloem parenchyma ,phlo
6.The labelled diagram of monocot root. Refer book
7. Binomial nomenclature is a system of giving scientific names in the form of two words to species.
8. The four major groups of protozoans.
1.amoeboidprotozoans,flagellatedprotozoans,ciliatedprotozoans,sporozoansprotozoans
9. Ttwo functions of root system.
provide anchorage
absorb and conduct the water and mineral salts
serve as food storage houses
for assimilation and additional support
site for synthesis of plant growth regulators
SECTION- C
8 x3 = 24
1. The three types of roots. Refer book
2. The functions of leaf.
Photosynthesis
Exchange of gases
transpiration
3. stomata are minute openings present in the epidermis of leaf or green parts of the plant.
one function of stomata.-Exchange of gases, transpiration
4. the three basic tissue systems in the flowering plants
epidermal tissue –parenchymatous tissue
groung or fundamental tissue- parenchyma,collenchyma,sclerenchyma
vascular tissue – xylem and phloem
5. Cell is the basic unit of life
Smallest unit capable of showing living existence
Unicellular organisms-All functions performed within a cell and division of labour exists between cell organelles
multicellular -All functions performed within a cell and division of labour exists between different cells tissues
and organs of body.
6. living organisms are classified-helps to study enormous diversity of organisms easily
helps to understand the resemblances and relationships
makes the comparison between groups easier
7. Write the scientific name of the following.
1.cobra -Naja raja
2.pea –Pisumsativum
3.rat – Rattusrattus
8. Draw any three types of bacteria. Refer book
SECTION –D
3x5 =15
1.Differentiate between
gram positive bacteria gram negative bacteria.
1.remains blue - do not
2.Outer membrane is absent - present
3. Cell wal is 20-80 nm thick – 8 -12 nm
4. Peptidoglycan layer has murein content 70-80% -10-20 %
5.Wall is smooth -wavy
6.Mesosomes are quite prominent –less prominent
7.Basal body -2 rings -4 rings
8.Susceptible or lysozyme –resistant to lysosomes
9.Few pathogenic - most of the pathogenic
2.Describe the structure of mitochondria with the help of labelled diagram.
Mitochondrial membraneouter membrane-outer boundary
inner membrane –cristae enzymes of electron transport chain
elementary particles,mitochondrial matrix.
Mitochondrial chambersouter chambers –adenylate kinase and nucleoside diphosphokinase
inner chambers – matrix,dense and filled with enzymes ,DNA ribosomes,TCA
3.various types of simple tissues in plant.
Parenchyma –isodiametric ,oval,spherical polygonal in shape,thin cell wall living disct nucleus large vacuole, forms
fundamental tissue present pith,cortex, medullary rays,mesophyll
Collenchyma- circular,oval,polygonal, thin cell wall no inter cellular space imple pits, living
Sclenrenchyma -dead, thick walled lignin lumen is very small oblique pits,closely packed, no intercellular space
SECTION- E
5X1=5
1.Amit wanted to transfer a plant into another pot. He was very careful while taking it out so as not to damage its root tip.
a. the type of tissues present at the root tip- apical meristem
b.three important features of the cells present in this tissues. – formation of leaves and elongation of the stem , the axillary
buds are present in the axis of leaves and are capable of giving rise to a branch or aflower,bring about an increase in the
length of the plant
c. the reason behind Amit being so careful while taking taking out the plant from the soil – awareness about root meristem
and its importance,knowledge about plant tissues