Select Board & Class
list any four methods of contraception used by humans. how does their use have a direct effect on the health and prosperity of the family?
why menstrual blood doesn't clot?
List all the changes that occur in the ovum during fertilisation.
Explain the process of oogenesis.
(please explain because i want the proper answer of this ques.)
Draw a neat labelled sketch of Graafian follicle.
how does menstrual flow occurs after tubectomy?... i mean the passage blocked then how does the degnerated egg comes out from...????
After a successful in vitro fertilization the fertilized egg begins for begins to divide where is this egg transferred before it reaches the 8 cell stage What is the techniques?
What is spermatogenesis? Briefly describe the process of spermatogenesis.
what is sporogenous tissue?
give a labeled diagram of spermatogenesis as im finding it difficult to understand .
Draw a labeled diagram of female reproductive system.
what is embryo proper?
why is menstrual cycle absent during pregnancy?
the function of prostate gland is ......?
spermatogenesis in human male is a hormone regulated process. justify
WHAT IS THE SIGNIFICANCE OF SPERMATOGENESIS & OOGENESIS?
Why does failure of testes to descend into the scrotum produce sterility?
how mammary glands are integrated structurally and functionally to support the process of ovulation, fertilization, pregnancy, birth and child care?????
plz explain, these lines are written in NCERT textbook.
explain male reproductive system
what is major difference between spermatogenesis & oogenesis?
difference between ducts and glands????
what is foetal ejection reflex?
Secondary oocyte retains bulk of the nutrient rich cytoplasm of the primary oocyte. Can you think of any advantage for this? rn Does the first polar body born out of first meiotic division divide further or degenerate?rn
The blood of the mother never mixes with that of the foetus yet it nourishes the foetus.HOW???
WHAT IS PREGNANCY HORMONE? WHY IT IS CALLED SO? NAME TWO SOURCES OF THIS HORMONE IN HUMAN FEMALE?
from where do signals of parturition originate and what does maternal pituitary release for stimulating uterine contractions for child birth?
which part of the blastula is destined to form the germ layers of the developing embro in humans
distingiush b/w morula gastrula and blastula
draw a flow chart to show the hormonal control of the human male reproductive system highlighting the inhibitory and stimulatory directions in it
Can anal sexual intercouse lead to fertilisation?If not, then why it is done?
WHAT IS THE FUNCTION OF INFUNDIBULUM
DIFFERENCE BETWEEN SPERMIOGENESIS AND SPERMIATION
difference between zoospore and zygote ?
Study the flow chart given below.Name the hormones involved at each stage and explain their role..
ovulation
to
Pregnancy
Placenta
foetal growth
parturition
what is oogenesis?
List the changes the primary oocyte underqoes in the tertiary follicular stage in the human ovary.
What are the three major phases of menstrual cycle in primates?Mention the key event in each phase.
why is placenta called a temporary endocrine gland?
when and how does placenta develop in human female?
the seminiferous tubules of the testis are lined by the germinal epithelium consisting of.......?
which hormone is called as the pregnancy hormone? ...why ?
Draw a labeled diagram of sperm.
explain the steps in the formation of an ovum from an oogonium in humans
what are the major features of embryonic development during the months of pregnancy?
what is corona radiata?what is the difference between corona radiata and zona pellucida?
why does not all copulations lead to pregnancy???
What is mean by Spermlysin ??????????
after tubectomy does menstrual cycle continue? there is a knot tied in the tube so how does the cycle takes place? pls give a proper answer
What is the difference between umbilical cord and placenta??
Draw a labeled diagram of a Graafian Follicle?
if asked to draw a labbeled diagram of male reproductive system in exam , which one we hav to write ...
there r 2 diagrams in textbook ...
pls answer asap
Q--. Identify the wrong statement from the following:a. High levels of estrogen triggers the ovulatory surge.b. Orgonial cells start to proliferate and give rise to functional ova inregular cycles from puberty onwards.c. Sperms released from seminiferous tubules are poorly motile /non-motile.d. Progesterone level is high during the post ovulatory phase ofmenstrual cycle.also explain...........
URGENT!! Define seminal vessicles ,,,prostate gland and cowper's gland.????
dear experts
1.why is oogenesis considered as a discontinous and wasteful process?
2.is ejaculation and insemination the same ?
3.what is monospermy?
4.how implantation takes place ?
does menstruation occur even after tubectomy in females?? and does ovulation too occurs??
What is the difference between blastulation and gastrulation?
what is the function of clitoris?
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Syllabus
list any four methods of contraception used by humans. how does their use have a direct effect on the health and prosperity of the family?
why menstrual blood doesn't clot?
List all the changes that occur in the ovum during fertilisation.
Explain the process of oogenesis.
(please explain because i want the proper answer of this ques.)
Draw a neat labelled sketch of Graafian follicle.
how does menstrual flow occurs after tubectomy?... i mean the passage blocked then how does the degnerated egg comes out from...????
After a successful in vitro fertilization the fertilized egg begins for begins to divide where is this egg transferred before it reaches the 8 cell stage What is the techniques?
What is spermatogenesis? Briefly describe the process of spermatogenesis.
(a) pivot joint
(b) hinge joint
(c) gliding joint
(d) ball and socket joint
what is sporogenous tissue?
give a labeled diagram of spermatogenesis as im finding it difficult to understand .
Draw a labeled diagram of female reproductive system.
what is embryo proper?
why is menstrual cycle absent during pregnancy?
1. Macrophages
2. Mast cells
3. Fibroblasts
4. Adipocytes
the function of prostate gland is ......?
spermatogenesis in human male is a hormone regulated process. justify
WHAT IS THE SIGNIFICANCE OF SPERMATOGENESIS & OOGENESIS?
Why does failure of testes to descend into the scrotum produce sterility?
how mammary glands are integrated structurally and functionally to support the process of ovulation, fertilization, pregnancy, birth and child care?????
plz explain, these lines are written in NCERT textbook.
explain male reproductive system
what is major difference between spermatogenesis & oogenesis?
difference between ducts and glands????
Q10. Which of the following is an example of positive feedback control in the reproductive cycle of males or females ?
(a) The increased response of the hypothalamus and anterior pituitary gland in response to estrogen.
(b) The decreased response of the hypothalamus and anterior pituitary gland in response to estrogen.
(c) The inhibition of luteinizing hormone by high levels of testosterone.
d) The stimulation of luteinizing hormone by low levels of testosterone.
what is foetal ejection reflex?
1) flagella
2) cilia
3) neutrophils
4) none of the above
Secondary oocyte retains bulk of the nutrient rich cytoplasm of the primary oocyte. Can you think of any advantage for this? rn
Does the first polar body born out of first meiotic division divide further or degenerate?rnThe blood of the mother never mixes with that of the foetus yet it nourishes the foetus.HOW???
WHAT IS PREGNANCY HORMONE? WHY IT IS CALLED SO? NAME TWO SOURCES OF THIS HORMONE IN HUMAN FEMALE?
from where do signals of parturition originate and what does maternal pituitary release for stimulating uterine contractions for child birth?
which part of the blastula is destined to form the germ layers of the developing embro in humans
distingiush b/w morula gastrula and blastula
draw a flow chart to show the hormonal control of the human male reproductive system highlighting the inhibitory and stimulatory directions in it
Can anal sexual intercouse lead to fertilisation?If not, then why it is done?
T.S of mammalian testis revealing seminiferous tubules show different types of cell
WHAT IS THE FUNCTION OF INFUNDIBULUM
DIFFERENCE BETWEEN SPERMIOGENESIS AND SPERMIATION
difference between zoospore and zygote ?
Study the flow chart given below.Name the hormones involved at each stage and explain their role..
ovulation
to
Pregnancy
to
Placenta
to
foetal growth
to
parturition
what is oogenesis?
List the changes the primary oocyte underqoes in the tertiary follicular stage in the human ovary.
What are the three major phases of menstrual cycle in primates?Mention the key event in each phase.
a)Ovarian hormone levels from 16-23days.
b)uterine events from 24-29 days.
c)Pituitary hormone level from 8-12 days.
d)Ovarian events from 13-15days.
e)Diagramatically represent pituitary and ovarian hormone if fertilisation has taken place.
why is placenta called a temporary endocrine gland?
(a) Cutting
(b) Layering
(c) Grafting
(d) Gootee
2. Anemophily refers to the pollination by (1Mark)
(a) Wind
(b) Water
(c) Animals
(d) Insects
3. A typical angiospemric embryosac is 8-nucleate and (1Mark)
(a) Single celled
(b) Seven celled
(c) Eight celled
(d) Four celled
4. Which of the is a start codon? (1Mark)
(a) UAA
(b) UAC
(c) AUG
(d) UAG
5. An unorganised mass of cells produced by ex-plant is called (1Mark)
(a) Callus
(b) Embryoid
(c) Somatic hybrid
(d) Protoplast
6. What is parthenogenesis considered as a special mode of reproduction in plants? (2Mark)
7. Differentiate between autogamy and geitonogamy. (2Mark)
8. State the two laws of thermodynamics to explain the flow of energy in an ecosystem. (2Mark)
9.
a. Draw a neat labelled diagram of the two-dimensional structure of t-RNA.
Or (3Mark)
b. Draw the chemical structure of ribose and deoxyribose sugar of nucleotides.
10. What are single cell proteins? Write two significance of single cell protein. (3Mark)
11. What are primary pollutants and secondary pollutants? Give examples. (3Mark)
12.
a. Explain the sequence of events during DNA replication.
Or (3Mark)
b. Explain the technique of DNA fingerprinting.
13.
a. What are cloning vectors? Describe the characteristics of a cloning vector.
Or (5Mark)
b. What are restriction endonuclease enzymes? Explain how restriction endonuclease enzymes are named.
14.
a. Define the term biodiversity. Enumerate the factors responsible for the loss of biodiversity.
Or (5Mark)
b. What is green house effect? Describe briefly the effects of global warming.
PART-B
1. At which stage, the implantation in uterus takes place? (1Mark)
(a) 8-cell stage
(b) Morula
(c) Blastocyst
(d) Late gastrula
2. The sterilization in males is performed surgically by (1Mark)
(a) Tubectomy
(b) Vasectomy
(c) Laparotomy
(d) Hysterectomy
3. A typical 1:2:1 phenotypic ratio in a monohybrid cross is a characteristic of (1Mark)
(a) Incomplete dominance
(b) Co-dominance
(c) Law of dominance
(d) Law of segregation
4. The antibiotic penicillin in produced from (1Mark)
(a) Bacteria
(b) Fungi
(c) Lichen
(d) Algae
5. Who coined the term ecology? (1Mark)
(a) Odum
(b) Ernst Haekal
(c) Arthur Tansley
(d) Darwin
6. Differentiate between homologous and analogous organs. (2Mark)
7. Give two important features of acquired immunity. (2Mark)
8. Define biowar. Give two examples of biological agents. (2Mark)
9.
(a) What is pedigree analysis? List any two advantages
Or (3Mark)
(b) what are the similarities found between man and great apes on the basis of molecular studies?
10. What is a transgenic animal? Give any two applications of transgenic animals. (3Mark)
11. What is commensalism? Explain with the help of an example. (3Mark)
12.
(a) Define spermatogenesis. Explain in brief the various stages of spermatogenesis.
Or (5Mark)
(b) Give the full form of ART. Explain any four techniques used in ART.
13.
(a) What is cancer? Explain four ways of treating cancer.
Or (5Mark)
(b) What are biofertilisers? Explain how fungi act as a biofertiliser
Answer all the question
when and how does placenta develop in human female?
the seminiferous tubules of the testis are lined by the germinal epithelium consisting of.......?
which hormone is called as the pregnancy hormone? ...why ?
(a) O
(b) A
(c) B
(d) AB.
Explain the answers in detail.
Draw a labeled diagram of sperm.
(a) 'spermatogonia'
(b) 'sperms'
(c) 'both' ???
explain the steps in the formation of an ovum from an oogonium in humans
what are the major features of embryonic development during the months of pregnancy?
what is corona radiata?what is the difference between corona radiata and zona pellucida?
why does not all copulations lead to pregnancy???
Where do both previous skin and muscle cells goes?
What is mean by Spermlysin ??????????
after tubectomy does menstrual cycle continue? there is a knot tied in the tube so how does the cycle takes place? pls give a proper answer
What is the difference between umbilical cord and placenta??
Draw a labeled diagram of a Graafian Follicle?
(A) primary spermatocyte
(B) Spermatids
if asked to draw a labbeled diagram of male reproductive system in exam , which one we hav to write ...
there r 2 diagrams in textbook ...
pls answer asap
Q--. Identify the wrong statement from the following:a. High levels of estrogen triggers the ovulatory surge.b. Orgonial cells start to proliferate and give rise to functional ova inregular cycles from puberty onwards.c. Sperms released from seminiferous tubules are poorly motile /non-motile.d. Progesterone level is high during the post ovulatory phase ofmenstrual cycle.also explain...........
URGENT!! Define seminal vessicles ,,,prostate gland and cowper's gland.????
Q. A couple have been trying to conceive a child for over a year without success. Recently, the man's doctor informed him that his seminal vesicles are defective. This means that
(a) the man makes functional sperm, but they are not delivered because he is unable to ejaculate.
(b) the man's sperm lack functional flagella
(c) the fluid needed to lubricate the man's urethra for easier sperm travel is defective.
(d) the man's semen lacks the fructose fuel needed for the sperm to swim.
dear experts
1.why is oogenesis considered as a discontinous and wasteful process?
2.is ejaculation and insemination the same ?
3.what is monospermy?
4.how implantation takes place ?
Reabsorption of chloride ions from glomerular filtrate in kidney tubule occurs by
(a) Active transport (b) Diffusion
(c) Osmosis (d) Brownian movement
does menstruation occur even after tubectomy in females?? and does ovulation too occurs??
What is the difference between blastulation and gastrulation?
what is the function of clitoris?
Explain in detaill. No link..