reproductive system

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(i) The organ in which foetus develops in a mammalian female.

(ii) The male reproductive cells of mammals.

(iii) The part of female reproductive system where fertilization takes place.

(iv) Produces male gamets in man.

(v) The fluid surrounding the developing embryo.

(vi) The structure in which testes are present in man.

(vii) The period of intrauterine development of embryo.

(viii) The canal through which testes descend into scrotum just before birth in a huma male child.

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uterus
testes
i have a doubt if it is vagina or fallopian tube
testes-seminiferous tubules
amniotic fluid
lobules
gestation period
inguinal canal

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3 . fallopian tube
6. it's scrotum (i think ) (you gotta clarify eldhose)

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yea it's surely scrotum

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hey guys..dat 2nd one..u sure ki itz testes..i think it is interstitial cells...well m also confused..plz help!!

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hey guyz......i also ve a boubt about 2nd ans.......plz tel correct ans#########

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hey siya......isnt the second one spermatozoa......or sperms...

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yes itz the interstitial cells they are even known as cells of leydig (BASIC UNIT OF THE ORGAN/StRUCTURE)

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male reproductive cells------sperm ......isnt it???????

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PLEASE NOTE WITH REFERENCE TO MY ANSWER IN THE PREVIOUS POST:

i think this one line will get you your answer:

Seminiferous Tubules:Sperms::Interstitial Cells:Testosterone

~~Interstitial cells produce sprems~~ WRONG

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TEST:

SCIENCE 3 (BIOLOGY)

Total Marks: 20
Time: 15 MINUTES
(ideally you should take less then 15 minutes for such easy questions)
BY JIGAR

------------------------------------------------------------------------------------------------------------------

Q.1 Answer as directed:

(i) example: White Blood Cells and ______________.
Ans: Phagocytosis

Diapedesis and _____________.

(ii)Kidney:Nephron::Testis:_________::Brain:_______ [3]

Q.2 Lachrymal gland secretion (Tears) contain ______ that kill germs. [1]

Q.3 Is the Oviducal Funnel lined with cilia, and if yes then why? [2]

Q.4 Explain/Define the terms: (i)Linkage(ii) Point Mutation(iii)Quantasome(iv)Heterozygous Dominant [4]

Q.5 Differentiate between Variation and Mutation AND Gametic Meiosis and Zygotic Meiosis [2]

Q.6 Why are most green leaves thin and broad? [2]

Q.7 Which is a sex-hormone out of the given? (Aldosterone, Cortisol and Androgens) [1]

Q.8 True or False: (And if false change, the underlined word with the correct answer only)

Centrosome help in intracellular digestion
To extend relief to victims of earth quakes is an activity of the Red Cross [2]

Q.9 Find the odd one out and state a valid reason for your answer: FSH, TSH, ACTH, ADH [1]

Q.10 Match the following:

A

Muscular Movement
Photolysis Of Water

B

Calvin Cycle
Hill Reaction
Creb's Cycle
Sebum
Pons
Cerebellum
Cerebrum [2]

--------------------------------------------------------------------
lemme see who out these geniuses DO NOT score 20/20

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it can testes hari...butnow, i m getting confused...it shud be sperms...

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JiGaR: i wanna know the answers Very Happy

so, i am attemting it....hope ou correct it...
Answ:

Q1

i WBC???
ii interstitial cells and neurons.

Q2....???lysosomes??

Q3 yes...to catch the ova produced by the ovary and then move it to the oviduct.

Q4 very tricky one...

i) linkage is the attraction btw the two homologous chromosomes ???
ii) Point mutation....whats the diff btw this and just mutation?

iii) -
iv) it is the condtition in which the chromosome contains dissimal pair of alleles, out of which one is dominant.

Q 5

Variation is the small differences btw the individuals. mutation is the sudden change in one or more genes in the progeny, which has not occured in the parents or even grandparents.

Gametic and zygotic...its guess:

gametic-occurs in the reproductive organs, to produce sex cells...eg. in testes n ovary...to produce sperm n ovum...occurs b4 fertilization.

zygotic-occurs after fertilization of the 2 gametes...occurs in the zygote formed after their fusion to produce sex cells in the zygote....???

Q6 thin-to reduce the area for transportation of water n minerals. n food, redces the distance btw the cells.....large-to increase the surface area, to increase the no. of chloroplasts, thus more sunlight can be absorbed...

in general, leaves are thin n large to faciliate greater rate of photosyn.

Q7 androgen?

Q8 1. false=lysosome
2. true

Q9 ADH coz this is secreted by posterior pitut. other by anterior...adh is normal hormone..but others are tropical hormones.

Q10

1-cerebellum
2-hill reaction

btw..what is sebum?

hope all are correct!! Smile

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Well...Well Anu not a bad score u got 17/20

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ill tell u wer u lost marks. accurately itz 16.5/20
but 17 can be accounted for ur attempt!~~
Q.1,Q.2,Q.3 : Scored full
Q.4 lost 3 marks:
i)Linkage: Tendency of certain genes, which are found too close to each
other to remain together, even at the time of inheritence also is called Linkage
and such genes are called Linked Genes.
ii)Point Mutation: A mutation that can be mapped to one specific site within a
locus (Im sure itz not dat important but u shud know the types of mutation)
iii)Quantasome: Smallest structural unit of photosynthesis, a particulate
component of the thylakoid membrane containing chlorophyll and cytochromes
iv)is rite
Q.5 is rite
Q.6 is rite but here u lost ur 0.5 mark beacuse u didnt talk about cuticle in thickness...less cutice more transpiration..in case of normal plants (non xerophytic)
Q.7, Q.8, Q.9, Q.10 are rite...

Go on page 2 for sebum nd mutations

congrats....ur gonna get a good score tomorrow!

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Sebum:

A thick substance that is secreted by
sebaceous glands that consists of fat and cellular debris.

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MUTATION:

First of all, Mutations can be classified as either GENE MUTATIONS or CHROMOSOME MUTATIONS according to the size of alteration.

Gene mutations can be divided as:

1-) Lethal Mutations

2-)Conditional Mutations

3-)Biochemical Mutations

4-)Resistance Mutations

When we look at the molecular basis of mutation,

Spontaneous Point Mutation, Point (single-site) mutations in DNA can occur through two possible way,

1-) The substitution of one base pair for another

a-)Silent Mutation

b-)Missense mutation

c-)Non sense mutation

2-)The addition or deletion of a nucleotide pair Basketball

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anymore queries?

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hey jigar, from which text are you studyin all this?
cause the text im using isn't as detailed as yours

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Last Test coz i m tired typin whole day today!!~~ nd a comparatively easy paper: BOARD TYPE SECTION A
Itz okay if you dont post these many answers just make sure u knw all dese coz our paper will be as easy as this!!~~
TEST 2 :

SCIENCE 3 (BIOLOGY)

Total Marks: 40
Time: 35 MINUTES
(ideally you should take less then 35 minutes for such easy questions)
BY JIGAR

------------------------------------------------------------------------------------------------------------------

Q.1 a) Complete the following [5]

i)In Photophosphorylation ........... is synthesized
ii)Corticods are secreted by.............
iii)Chiasmata are indicators of.................................
iv).............is a sex-linked trait
v)Stroma is the ground substance in.....................

b)Name the following: [5]

i)The phase of mitosis where the centrioles divide and move towards the poles
ii)The science that deals with heredity
iii)The chemical used to remove CO2 from entering a control experiment in photosynthesis
iv)The process in which chromosome number is restored
v)The part of the brain which controls body temperature

c)State whether the following are true or false and if false correct the sentence by changing the incorrect word only [5]

i)A cell is plasmolysed when it is placed in the hypotonic solution
ii)When the air is humid transpiration becomes faster
iii)The common term for both sperm and egg is called zygote
iv)Identical twins develop from two different embryos
v)Grey matter of brain consists of cell bodies of neuron

d) Match the following [5]

Cerebrospinal fluid, Cretinism, Lachrymal Gland, etlion, Polythene Sheet

Options:

Impermeable Membrane
Cuticle
Permeable Membrane
Lenticels
Yellowish-Brown in colour
Green in colour
Calvin's cycle
Hill reaction
Brain
Tear
Cerebellum
Cerebrum
Thyroxine
Sebum

e) Put the terms in a logical sequence & find the incorrect term(s) and replace it with the correct term: [5]

i)Ear Drum->Auditory Canal->Pinna->Brain->Optic Nerve->Cochlea
ii)Ovary->Urethra->Vas Deferens->Egg
iii)Dorsol Root Ganglion->Effector->Sensory Neuron->Motor Nerve
iv)Adrenaline->Pituitary->Hypothalamus->Thyroid
v)Leaves->Root Hair->Phloem->Endodermis

f)State Location And Two Function of each of the following: [10]
i)Pituitary Gland
ii)Hyaluronidase
iii)Seminal Vesicle
iv)Ciliary Muscles
v)Pons

g) Define the following: [5]
i)Turgor Pressure
ii)Myopia
iii)Exocrine Glands
iv)Hyaluronidase
v)Allele

guys plz reply if not appreciation sumthing or d otherbut do reply yaar!!~~ nd im gonna post such 2 papers for each subject from know on:!!~~~if u think itz fyn! cyclops

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so hws d prep? Question

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a.s wrote:: hey jigar, from which text are you studyin all this?
cause the text im using isn't as detailed as yours

no i 2 use concise..
sum (which is not DAT important) is stuff my
teacher told might be JUST important to
know.............................so chill dont worry the test 2 is d
type of paper we will get!!~~~SUCH EASY PAPER CHK IT OUT!~ Wink

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cool:/// not even 24 hours joining this forum ~~~~ MY 25TH POST.....lol

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JiGaR wrote:: cool:/// not even 24 hours joining this forum ~~~~ MY 25TH POST.....lol

I LOVE DIS FORUM & I LOVE ICSE

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can you rectify these ans for me?

1a iii)Chiasmata are indicators of - meiosis?

e ii)Ovary->Urethra->Vas Deferens->Egg

Ans: is it sperms>testes>vas deferens>urethra
or testes>sperms>vas deferens>urethra?
cause logically within the testes, formation of sperms take place
so which one is it?

thanks in advance