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The mode of arrangement of ovule along t...

The mode of arrangement of ovule along the placenta in the cavity of the ovary

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Placentation
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Assertion:The placentation in which the placenta forms a ridge along the ventral suture of ovary and ovules are borne on this ridge forming two rows is called parietal placentation. Reason:The marginal placentation has ovules developed on the inner wall of the ovary or on peripheral part.

Ovule is attached to placenta of ovary wall by :

The underline("ovule") is attached to the placenta of ovary by means of nucellus.

In_________placentation, a monocarpellary ovary bears a sigle longitudinal ovule along the junction of two fused margins.

A typical angiospermous ovule is attached to the placenta by means of a stalk called X. Body of the ovule fuses with X in the region called Y. Identify X and Y.

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

Given below are four methods (A-D) and their modes of action (i-iv) in achieving contraception. Select their correct matching from the four options that follow {:(,"Method",,"Mode of Action"),("A.","Oral pill","(i)","Prevents sperms reaching cervix"),("B.","Condom","(ii)","Suppresses sperm motility"),("C.","Vasectomy","(iii)","Prevents ovulation"),("D.","Copper T","(iv)","Semen contain no sperms"):}

Stalk with which ovule remains attached to the placenta is called