Home
Class 12
BIOLOGY
How many statements are incorrect among ...

How many statements are incorrect among following statements :-
(i) LH surge induce rupture of graffian follicle.
(ii) At puberty total 60000-80000 primary follicles are left in both ovaries.
(iii)Immediately after implantation inner cell mass differentiates into placenta.
(iv)Mammary glands differentiates after child birth.

A

1

B

2

C

3

D

4

Text Solution

AI Generated Solution

The correct Answer is:
To determine how many statements are incorrect among the given options, we will analyze each statement one by one. ### Step-by-Step Solution: 1. **Statement (i): LH surge induces rupture of Graafian follicle.** - **Analysis:** Luteinizing Hormone (LH) plays a crucial role in the ovulation process. The surge in LH levels is what triggers the rupture of the Graafian follicle, leading to the release of the egg. - **Conclusion:** This statement is **correct**. 2. **Statement (ii): At puberty, a total of 60,000-80,000 primary follicles are left in both ovaries.** - **Analysis:** At puberty, the number of primary follicles remaining in the ovaries is indeed around 60,000 to 80,000. However, this number refers to the total in both ovaries, which is correctly stated. - **Conclusion:** This statement is **correct**. 3. **Statement (iii): Immediately after implantation, the inner cell mass differentiates into placenta.** - **Analysis:** After implantation, the inner cell mass does not directly differentiate into the placenta. Instead, the trophoblast cells form first, which eventually contribute to the placenta. The inner cell mass develops into the embryo. - **Conclusion:** This statement is **incorrect**. 4. **Statement (iv): Mammary glands differentiate after childbirth.** - **Analysis:** Mammary glands undergo differentiation during puberty, preparing for milk production. After childbirth, the glands produce milk, but they do not differentiate at that time. - **Conclusion:** This statement is **incorrect**. ### Summary of Findings: - **Correct Statements:** 1 (i), 2 (ii) - **Incorrect Statements:** 3 (iii), 4 (iv) ### Final Answer: Out of the four statements, **two statements are incorrect** (iii and iv). ---
To determine how many statements are incorrect among the given options, we will analyze each statement one by one. ### Step-by-Step Solution: 1. **Statement (i): LH surge induces rupture of Graafian follicle.** - **Analysis:** Luteinizing Hormone (LH) plays a crucial role in the ovulation process. The surge in LH levels is what triggers the rupture of the Graafian follicle, leading to the release of the egg. - **Conclusion:** This statement is **correct**. ...
Promotional Banner

Similar Questions

Explore conceptually related problems

How many of the given statements are incorrect ? I. The cavity of the cervix is called cervical canal which along with vagina forms the birth canal. II. Spermatogenesis starts at the age of puberty. III. At puberty, only 60,000-80,000 primary follicles are left in female body. IV. In the early phase of pregnancy, a hormone called relaxin is also secreted by the ovary.

Read the following statements carefully. (1) Female external genitalia include labia majora , labia minora , clitoris , vagina, and hymen . (2) In female, at puberty , both ovaries contain about 60,000-80,000 primary follicles . (3) The progesterone hormone concentration remains high prior to ovulation in the follicular phase of the follicular phase of the menstrual cycle . (4) The second meiotic division of secondary oocyte is completed inside ovary only after the entry of sperm. How many from the above are incorrect statements ?

Read the following statements about menstrual cycle and select two correct statements. (i) Lack of menstruation may be indicative of pregnancy. (ii) The changes in the ovary and the uterus are induced by changes in the levels of ovarian hormones only. (iii) LH surge induces ovulation. (iv) If fertilization occurs, corpus luteum degenerates immediately

Read the following sentences and select the correct option with all true statements. i. During parturition , oxytocin induces intense contractions in the uterus. ii. After parturition oxytocin stimulates milk ejection. iii . The labour pain of during child-birth is due to oxytocin . iv. oxytocin is secreted from placenta and ovary .

Read the statements given below : (i) The first movements of the foetus are usually observed during 7th months of pregnancy. (ii) Umbilical cord possess 100 percent foetal blood. (iii) At puberty , in female each ovary contain about 60,000 - 80,000 primary follicles. Choose the correct Statement from the above

Read the statements given below : (i) The first movements of the foetus and appearance of hair on the head are usually observed during 5th months of pregnancy. (ii) The structural and functional unit between developing embryo and the maternal body is called the umbilical cord . (iii) At puberty , in female both ovaries contain about 60,000 –80,000 primary follicles . Choose the correct statement from the above .

which of the following statements regarding fertilization and implantation are incorrect ? I. During fertilization , a sperm first comes in contact with the corona radiata cells produced by the ovum. II. Fertilization occurs only if sperm and ovum are simultaneously transported to the ampullary region. III. Implantation occurs about 7 days after fertilization . IV. The continuous division of morula leads to the formation of zygote.

Go through the following statements (i) Mammary glands are modified sweat glands and each mammary gland consists of 15-25 lobules of the compund tubulo-alveolar type. (ii) The tertiary follicle is characterised by a fluid filled cavity called antrum (iii) Both LH and FSH attain a peak level towareds the middle of teh menstrual cycle (iv). In oogenesis, both first and second meiotic divison are unequal Which of these are correct?