Match the pairs and rewrite: Column I Column II (1) Mechanical Means (a) Saheli (2) Physiological device (b) Jellies (3) Chemical device (c) Vasectomy (4) Permanent method (d) Diaphragm

Given in the table are variou s birth control methods that function by different means. The correct match has been given below: Column I Column II (1) Mechanical Means (d) Diaphragm (2) Physiological device (a) Saheli (3) Chemical device (b) Jellies (4) Permanent method (c) Vasectomy

Draw a neat labelled diagram of T.S. of the ovary and describe various phases of the menstrual cycle.

Figure: T.S of Human Ovary The menstrual cycle is a reproductive cycle that takes place in the females of the group of primates. The menstrual cycle is divided into four phases: Menstrual phase: It extends from the 1st to the 4th day of the cycle. It occurs in the absence of fertilisation. During this phase, bleeding occurs as the endometrium of the uterus is sloughed off. The menstrual flow consists of secretion of endometrial glands, cell debris, unfertilized ovum. After the 4th day, once again the FSH secretion from the pituitary is resumed and the new follicle starts developing. Follicular phase: When the ovary is in this phase, the uterus enters the proliferative phase. This takes place from the 5th to the 13th day of the cycle. During this phase new primordial follicle in the ovary develops due to the action of FSH from the pituitary. It gradually changes into the Graafian follicle and the production of estrogen starts. Only one follicle develops in one cycle. Corresponding to the changes in the ovary, the uterus also undergoes proliferation. Endometrial glands, stimulated by estrogen repair the uterus. Ovulatory phase: During this phase, ovulation takes place. It usually occurs on the 14th day. Mature Graafian follicle ruptures due to LH secretion by the pituitary. Graafian follicle bursts and releases the ovum. This ovum along with the follicular fluid is picked up by the fimbriae of the infundibulum of the fallopian tube. It passes through the fallopian tube, where, if it happens to meet a sperm, it is fertilised. If not fertilised, the ovum degenerates. Luteal phase: It corresponds with the secretory phase in the uterus. It takes place between the 15th to 28th days of the cycle.

Match the pairs and rewrite: Column I Column II (1) Mechanical Means (a) Saheli (2) Physiological device (b) Jellies (3) Chemical device (c) Vasectomy (4) Permanent method (d) Diaphragm

Given in the table are variou s birth control methods that function by different means. The correct match has been given below: Column I Column II (1) Mechanical Means (d) Diaphragm (2) Physiological device (a) Saheli (3) Chemical device (b) Jellies (4) Permanent method (c) Vasectomy

Describe the structure of human sperm.

The sperm is the male gamete formed inside the testes. It consists of the following four parts: Head: It is formed of the nucleus and an anterior cap called the acrosome. The acrosome is made of the Golgi apparatus. Neck: It is a very short part after the head and contains a pair of centrioles. Middle piece: It is a cylindrical structure that contains an axial filament surrounded by many mitochondria. Tail: It is a very long, cylindrical and tapering structure in which the axial filament.

E M B I B E

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR BIOLOGY>Chapter 18 - Human Reproduction>Maharashtra Board-2019>Q 3

HARD

12th Maharashtra Board

IMPORTANT

Earn 100

Approximately how many eggs are produced by a normal healthy human female up to the age of 25 years if the age of menarche is 12 years:

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Important Questions on Human Reproduction

HARD

12th Maharashtra Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR BIOLOGY>Chapter 18 - Human Reproduction>Maharashtra Board-2019>Q 4

Identify A, B, C in the given diagram and give their functions:

Question Image

HARD

12th Maharashtra Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR BIOLOGY>Chapter 18 - Human Reproduction>Maharashtra Board-2019>Q 5

Explain various mechanical methods of birth control.

EASY

12th Maharashtra Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR BIOLOGY>Chapter 18 - Human Reproduction>Maharashtra Board-2020>Q 6

Identify the cell labelled ‘A’ in the T.S. of the testis:

Question Image

HARD

12th Maharashtra Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR BIOLOGY>Chapter 18 - Human Reproduction>Maharashtra Board-2020>Q 7

Match the pairs and rewrite:

Column I	Column II
(1) Mechanical Means	(a) Saheli
(2) Physiological device	(b) Jellies
(3) Chemical device	(c) Vasectomy
(4) Permanent method	(d) Diaphragm