Recent questions tagged ch3

Regarding Phaeophyceae: Match the following and choose the most appropriate option:

asked Apr 2, 2014 by pady_1

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Regarding Phaeophyceae: Match the following and choose the most appropriate option:

asked Apr 2, 2014 by pady_1

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Regarding classes and Major Pigments of algae - Match the following and choose the most appropriate option:

asked Apr 2, 2014 by pady_1

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Regarding classes and Cell Wall of algae - Match the following and choose the most appropriate option:

asked Apr 2, 2014 by pady_1

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Regarding classes and Stored Food of algae - Match the following and choose the most appropriate option:

asked Apr 2, 2014 by pady_1

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Regarding classes and Major Pigments of algae - Match the following and choose the most appropriate option:

asked Apr 2, 2014 by pady_1

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Regarding classes and common name of algae - Match the following and choose the most appropriate option:

asked Apr 2, 2014 by pady_1

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Match the following and choose the most appropriate option: (each option on 3 columns can be matched to multiple options on the another 2 columns) eg. A-(iv)-3,5; B-(i); C-(iii)-2; D-(ii),(vi),(vii)-1; (iii),(v)-6;

asked Apr 2, 2014 by pady_1

1 answer

Regarding Sexual reproduction in Algae - Match the following and choose the most appropriate option: (each option on both columns can be matched to multiple option on the another side ie right or left) eg. A-1,2 ; B,C,D-3 ; A,B,C-3,4

asked Apr 2, 2014 by pady_1

1 answer

Regarding the form and size of algae - Match the following and choose the most appropriate option: (each option on both columns can be matched to multiple option on the another side ie right or left) eg. A-1,2 ; B,C,D-3 ; A,B,C-3,4

asked Apr 2, 2014 by pady_1

1 answer

Match the following and choose the most appropriate option: (each option on both columns can be matched to multiple option on the another side ie right or left) eg. A-1,2 ; B,C,D-3 ; A,B,C-3,4

asked Apr 2, 2014 by pady_1

1 answer

To which stages A, B corresponds ? When is B completed? What are the values of x, y, z ?

asked Mar 26, 2014 by pady_1

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To which stages A, B, C, D corresponds ? What are the values of x, y, z (choose the appropriate option)?

asked Mar 26, 2014 by pady_1

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Identify A, B, C in order in the picture - What happens at the point D (choose the appropriate option) :

asked Mar 26, 2014 by pady_1

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Identify A, B, C, D, E and F in order in the picture - choose the appropriate option :

asked Mar 26, 2014 by pady_1

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The embryo with 8 to 16 blastomeres is called a _______ (e), which continues to divide and transforms into (g) as it moves further into the uterus. The blastomeres are arranged into an outer layer called _ (J) and an inner group of cells attached to trophoblast called the __________ (I). What is (h) and what does it imply?

asked Mar 26, 2014 by pady_1

1 answer

What are (a) and (b)? The mitotic division starts as the zygote moves through the isthmus of the oviduct called _ towards the uterus and forms 2, 4, 8, 16 daughter cells called ____ .

asked Mar 26, 2014 by pady_1

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Identify the structures marked as A, B, C, D, E, F in order in the picture :

asked Mar 26, 2014 by pady_1

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Regarding the structures marked as A, B, C, D in the picture choose the appropriate statement:

asked Mar 26, 2014 by pady_1

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Regarding the structures marked as A, B, C, D, E in the picture choose the appropriate statement:

asked Mar 26, 2014 by pady_1

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Identify the structures marked as A, B, C, D in order in the picture; Identify E :

asked Mar 26, 2014 by pady_1

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Identify A, B, C and specify what are they? Identify the structures marked as D, E in order in the picture :

asked Mar 26, 2014 by pady_1

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Identify the structures marked as A, B, C and D - also specify what they constitute (E) in order in the picture :

asked Mar 26, 2014 by pady_1

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Identify the structures marked as A, B, C, D, E in order in the picture :

asked Mar 26, 2014 by pady_1

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Identify the structures marked as A, B, C, D, E in order in the picture :

asked Mar 26, 2014 by pady_1

1 answer

Identify the structures marked as A, B, C, D, E, F in order in the picture :

asked Mar 26, 2014 by pady_1

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Identify the structures marked as A, B, C, D, E, F in order in the picture :

asked Mar 26, 2014 by pady_1

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Identify the structures marked as A, B, C, D, E in order in the picture :

asked Mar 26, 2014 by pady_1

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Identify the structures marked as A, B, C, D, E in order in the picture :

asked Mar 26, 2014 by pady_1

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If $\begin{pmatrix} a+4 &3b \\ 8 & -6 \end{pmatrix} = \begin{pmatrix} 2a+2 &b+2 \\ 8 & a-8b \end{pmatrix}$, write the value of $a-2b$.

asked Mar 21, 2014 by balaji

1 answer

1. The theca layer of ovarian follicles is organised into an inner theca interna and an outer theca externa. 2. The primary oocyte within the tertiary follicle grows in size and completes its first meiotic division. 3. First meiotic division is an unequal division resulting in the formation of a large haploid tertiary oocyte and a tiny first polar body Regarding 1,2 and 3 :

asked Mar 20, 2014 by pady_1

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1. Each primary oocyte then gets surrounded by a layer of granulosa cells and is called the primary follicle. 2. The primary follicles get surrounded by more layers of granulosa cells and a new theca and are called secondary follicles. 3. The secondary follicle soon transforms into a tertiary follicle which is characterised by a fluid filled cavity called antrum. Regarding 1,2 and 3 :

asked Mar 20, 2014 by pady_1

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1. Oogonia start division and enter into prophase-II of the meiotic division 2. Oogonia get temporarily arrested at that stage are called primary oocytes. 3. Each primary oocyte then gets surrounded by a layer of granulosa cells and is called the primary follicle. Regarding 1,2 and 3 :

asked Mar 20, 2014 by pady_1

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1. The process of formation of a mature female gamete is called oogenesis. 2. Oogenesis is initiated during puberty when a couple of million gamete mother cells (oogonia) are formed within each mature ovary. 3. More oogonia are formed and added during 18 to 35 years (reproductive period). Regarding 1,2 and 3 :

asked Mar 20, 2014 by pady_1

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1. Sperms released from the seminiferous tubules, are transported by the accessory ducts. 2. Secretions of epididymis, vas deferens, seminal vesicle and prostate are essential for maturation of sperms. 3. Secretions of epididymis, vas deferens, seminal vesicle and prostate are essential for motility of sperms. Regarding 1,2 and 3 :

asked Mar 20, 2014 by pady_1

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The human male ejaculates (i) about 20 to 30 million sperms during a coitus of which, (ii) for normal fertility, at least 40 per cent sperms must have normal shape and size and (iii) for normal fertility, at least 50 per cent of them must show vigorous motility. Regarding (i), (ii) and (iii) :

asked Mar 20, 2014 by pady_1

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1. A plasma membrane envelops the whole body of sperm. 2. The sperm head contains an elongated haploid nucleus. 3. The posterior portion of nucleus is covered by a cap-like structure, acrosome. 4. The acrosome is filled with enzymes that help fertilisation of the ovum. Regarding 1,2,3 and 4 :

asked Mar 20, 2014 by pady_1

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1. The spermatids are transformed into spermatozoa by the process called gametogenesis. 2. After spermiogenesis, sperm heads become embedded in the Leydig cells. 3. And they are finally released from the seminiferous tubules by the process called spermiation. Regarding 1,2 and 3 :

asked Mar 20, 2014 by pady_1

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1. Primary spermatocytes periodically undergo meiosis. 2. A primary spermatocyte completes the first meiotic division leading to formation of four secondary spermatocytes. 3. Secondary spermatocytes undergo the second meiotic division to produce four unequal, haploid spermatids. Regarding 1,2 and 3 :

asked Mar 20, 2014 by pady_1

1 answer

1. Each spermatogonium contains 46 chromosomes. 2. Primary spermatocytes have 23 chromosomes each. 3. Secondary spermatocytes also have 23 chromosomes each. Regarding 1,2 and 3 :

asked Mar 20, 2014 by pady_1

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In testis: 1. The immature male germ cells are called spermatogonia (sing. spermatogonium). 2. Spermatogonia produce sperms by spermatogenesis. 3. Spermatogenesis begins at puberty. Regarding 1,2 and 3 :

asked Mar 20, 2014 by pady_1

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Given the following statements:

asked Mar 20, 2014 by pady_1

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1. The glandular tissue of each breast is divided into 5-10 mammary lobes containing clusters of cells called alveoli. 2. The cells of alveoli secrete milk. 3. Milk is stored in the cavities (lumens) of alveoli. Regarding 1,2 and 3 :

asked Mar 20, 2014 by pady_1

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1. Mons pubis is a cushion of fatty tissue covered by skin and pubic hair. 2. The *** minora are fleshy folds of tissue, which extend down from the mons pubis and surround the vaginal opening. 3. The * majora are paired folds of tissue under the *** minora. Regarding 1,2 and 3 :

asked Mar 20, 2014 by pady_1

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1. The uterus opens into ****** through a broad cervix. 2. The cavity of the cervix is called cervical canal. 3. Cervical canal solely forms the birth canal. Regarding 1,2 and 3 :

asked Mar 20, 2014 by pady_1

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1. The infundibulum leads to a wider part of the oviduct called isthmus. 2. The last part of the oviduct is ampulla. 3. Ampulla has a narrow lumen. 4. Isthmus joins the uterus. Regarding 1,2,3 and 4 :

asked Mar 20, 2014 by pady_1

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1. The ovaries are located one on each side of the upper abdomen. 2. Each ovary is about 2 to 4 cm in length 3. They are connected to the pelvic wall and uterus by ligaments. Regarding 1,2 and 3 :

asked Mar 20, 2014 by pady_1

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1. The *** is the male external genitalia 2. It is made up of special tissue that helps in erection of the * 3. Erection of the *** facilitates insemination. Regarding 1,2 and 3 :

asked Mar 20, 2014 by pady_1

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1. The urethra originates from the urinary bladder 2. It extends through the ***** to its external opening 3. Its external opening called urethral meatus. Regarding 1,2 and 3 :

asked Mar 20, 2014 by pady_1

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In testes : 1. Each seminiferous tubule is lined on its inside by two types of cells called male germ cells and Sertoli cells. 2. Sertoli cells undergo meiotic divisions finally leading to sperm formation. 3. The male germ cellsprovide nutrition to the germ cells. Regarding 1,2 and 3 :

asked Mar 20, 2014 by pady_1

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