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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?
why is placenta called a temporary endocrine gland?
Explain the process of oogenesis.
(please explain because i want the proper answer of this ques.)
Draw a neat labelled sketch of Graafian follicle.
what is embryo proper?
how does menstrual flow occurs after tubectomy?... i mean the passage blocked then how does the degnerated egg comes out from...????
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 happens to the blastocyst immediately after implantaion?
Draw a labelled diagram of Blastocyst
why is menstrual cycle absent during pregnancy?
the function of prostate gland is ......?
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.
WHAT IS THE SIGNIFICANCE OF SPERMATOGENESIS & OOGENESIS?
List all the changes that occur in the ovum during fertilisation.
Why does failure of testes to descend into the scrotum produce sterility?
explain male reproductive system
what is major difference between spermatogenesis & oogenesis?
A. Corona radiata, zona pellucida, vitelline membrane
B. Zona pellucida, corona radiata, vitelline membrane
C. Vitelline membrane, zona pellucida, corona radiata
D. Zona pellucida, vitelline membrane, corona radiate pls explain with diagram as nothing is mentioned nywhere about vitelline membrane.
difference between ducts and glands????
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
what is foetal ejection reflex?
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?
distingiush b/w morula gastrula and blastula
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
1.What is the difference between seminal plasma,seminal secretion and semen?
difference between zoospore and zygote ?
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.
plese add a flow chart shows the way of ovum upto fertilisation.plesssssssssss
when and how does placenta develop in human female?
spermatogenesis in human male is a hormone regulated process. justify
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 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
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 ?
What are the secretions of prostate and bulbourethral glands? Also write the function of each of the secretions.
what is the function of mammary ampulla and wat is it?
does menstruation occur even after tubectomy in females?? and does ovulation too occurs??
how does progesterone inhibit ovulation evenb4 the formation of corpus luteum?( additional q/a - topic menses)
What is the difference between blastulation and gastrulation?
Which of the following statements is correct regarding maturation phase of oogenesis?
The primary oocyte undergoes reductional division to produce two equal haploid cells.
The primary oocyte undergoes reductional division to produce two unequal haploid cells.
The primary oocyte undergoes equational division to produce two equal haploid cells.
The primary oocyte undergoes equational division to produce two unequal haploid cells.
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?
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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?
why is placenta called a temporary endocrine gland?
Explain the process of oogenesis.
(please explain because i want the proper answer of this ques.)
(a) O
(b) A
(c) B
(d) AB.
Explain the answers in detail.
Draw a neat labelled sketch of Graafian follicle.
what is embryo proper?
how does menstrual flow occurs after tubectomy?... i mean the passage blocked then how does the degnerated egg comes out from...????
What is spermatogenesis? Briefly describe the process of spermatogenesis.
1. Macrophages
2. Mast cells
3. Fibroblasts
4. Adipocytes
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 happens to the blastocyst immediately after implantaion?
Draw a labelled diagram of Blastocyst
why is menstrual cycle absent during pregnancy?
the function of prostate gland is ......?
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.
WHAT IS THE SIGNIFICANCE OF SPERMATOGENESIS & OOGENESIS?
List all the changes that occur in the ovum during fertilisation.
Why does failure of testes to descend into the scrotum produce sterility?
T.S of mammalian testis revealing seminiferous tubules show different types of cell
explain male reproductive system
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 major difference between spermatogenesis & oogenesis?
Layers of ovum from outside to inside are .
A. Corona radiata, zona pellucida, vitelline membrane
B. Zona pellucida, corona radiata, vitelline membrane
C. Vitelline membrane, zona pellucida, corona radiata
D. Zona pellucida, vitelline membrane, corona radiate
pls explain with diagram as nothing is mentioned nywhere about vitelline membrane.
difference between ducts and glands????
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?rnwhat is foetal ejection reflex?
Q). The controlling centre of autonomic nervous system is
(a) Hypothalamus
(b) Spinal cord
(c) Cerebellum
(d) Medulla oblongata
WHAT IS PREGNANCY HORMONE? WHY IT IS CALLED SO? NAME TWO SOURCES OF THIS HORMONE IN HUMAN FEMALE?
Q.24. Mark the correct statement
(a) The space between cornea and lens is filled with transparent gel
(b) When all cones are stimulated equally a sensation of no light (dark) is produced
(c) Rhodopsin is purplish red protein, hence called visual purple
(d) The anterior transparent portion of choroid is called cornea
from where do signals of parturition originate and what does maternal pituitary release for stimulating uterine contractions for child birth?
(a) pivot joint
(b) hinge joint
(c) gliding joint
(d) ball and socket joint
distingiush b/w morula gastrula and blastula
Can anal sexual intercouse lead to fertilisation?If not, then why it is done?
Q.7. The polarity of the membrane is reversed
(a) During action potential
(b) When there is nerve impulse at the site
(c) And the membrane is said to be depolarized
(d) All of these statements are correct
WHAT IS THE FUNCTION OF INFUNDIBULUM
1) flagella
2) cilia
3) neutrophils
4) none of the above
DIFFERENCE BETWEEN SPERMIOGENESIS AND SPERMIATION
1.What is the difference between seminal plasma,seminal secretion and semen?
difference between zoospore and zygote ?
Q.20. The Hypophyseal portal system transports releasing and inhibiting hormones from the hypothalamus into which of the following parts marked as I, II, III and IV.
(a) I
(b) II
(c) III
(d) IV
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.
plese add a flow chart shows the way of ovum upto fertilisation.plesssssssssss
when and how does placenta develop in human female?
spermatogenesis in human male is a hormone regulated process. justify
(a) a sudden release of FSH from the anterior pituitary.
(b) a lack of estrogens and progesterone due to degeneration of corpus luteum.
(c) an increased released of estrogens and progesterone from the corpus luteum.
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 is corona radiata?what is the difference between corona radiata and zona pellucida?
(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
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??
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.
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
URGENT!! Define seminal vessicles ,,,prostate gland and cowper's gland.????
(Describe the Pathway)
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 ?
What are the secretions of prostate and bulbourethral glands? Also write the function of each of the secretions.
what is the function of mammary ampulla and wat is it?
does menstruation occur even after tubectomy in females?? and does ovulation too occurs??
how does progesterone inhibit ovulation evenb4 the formation of corpus luteum?( additional q/a - topic menses)
What is the difference between blastulation and gastrulation?
Which of the following statements is correct regarding maturation phase of oogenesis?
OptionsThe primary oocyte undergoes reductional division to produce two equal haploid cells.
The primary oocyte undergoes reductional division to produce two unequal haploid cells.
The primary oocyte undergoes equational division to produce two equal haploid cells.
The primary oocyte undergoes equational division to produce two unequal haploid cells.
Q15. Assume 2n = 12 in a hypothetical species. In gametogenesis, the number of chromosomes in a spermatid would be _____________ and in a first polar body would be __________
(a) 3,6 (b) 3 , 3
(c) 6 ,3 (d) 6 , 6
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?