Home
Class 12
BIOLOGY
Mature ovules are classified on the basi...

Mature ovules are classified on the basic of funiculus. If micropyle comes to lie close to the funiculus the ovule is termed as

A

orthotropous

B

anatropous

C

hemitropous

D

campylotropous

Text Solution

Verified by Experts

The correct Answer is:
B
Depending upon the configuration and orientation of the body of ovule in relation to funiculus. There are six types of ovule - orthtropous (atropous, erect), anatropous (inverted) hemitropous (half inverted), campylotropous (body curved), amphitropous (both body and embryo sac curved) and cricinotropous (funiculus is coiled around the ovule). circinotropous (funiculus is coiled around the ovule). Anatropous or inverted ovule is the most common type of ovule found in angiosperms (in `82%` of angiosperm families). Here, body of the ovule gets inverted and micropyle is aon lower side. Further micropyle and funiculus lie side and micropyle is close to helium.
Promotional Banner

Similar Questions

Explore conceptually related problems

When micropyle, chalaza and hilum lie in a straight line, the ovule is said to be

(i) Ovule is also called microsporangium (ii) Stalk of mature ovule is called integument (iii) Body of an ovule is made of nucellus (iv) Nucellus is enveloped by one or two coverings called integuments

Structure which guides the pollen tube towards micropyle of ovule ………..

Match the following : {:("(1)Hemianatropus","(i) hilum , micropyle and chalaza of ovule lie adjecent lie adject to one another"),("(2)Circintropus","(ii)body of ovule is at right angles to funiculus"),("(3)Campylotropus","(iii) completed inverted ovule"),("(4)Anatropus","(iv)Elongated funiculus surrounds ovule"):}

Given below are four statements (A-D) each with one or two blanks. Select option which correctly fills up the blanks in any two statements. (A) Multiple ovulation ul(i) transfer teachnology is for ul(ii) improvement. (B) In it a cow is administered ul(i) to induce follicular maturation and ul(ii) ovulation. (C) Instead of one egg per cycle, ul(i) eggs are produced through it. (D) The fertilised ul(i) at ul(ii) celled stages are recovered non-surgically and transferred to surrogate mothers.

Given below are the three statements each with one or two blanks. Select the option which correctly fills up of the blank in any two statements. A. Inbreeding helps in accumulation of ul(i) and elimination of ul(ii) . B. In MOET a cow is administered hormones, with ul(i) like activity, to induce follicular maturation and super ovulation. C. Hisardale is a new breed of sheep developed in Punjab by crossing ul(i) and ul(ii) .

In anatropous ovule, the micropyle faces...............

Match column I (terms) with column II (definitions) and select the correct option from the codes given below. {:(,"Column I",,"Column II"),((A),"Parturition",(i),"Attachment of embryo to endometrium"),((B),"Gestation",(ii),"Release of eff from Graafian follicle"),((C),"Ovulation",(iii),"Delivery of baby from uterus"),((D),"Implantation",(iv),"Duration between pregnancy and birth"),((E),"Conception",(v),"Fomation of zygota by fusion of the ff and sperm"),(,,,"Stoppage of ovulation and menstrtion"):}

{:(1,"Integument",(i),"Perisperm"),(2,"Ovule",(ii),"Stalk"),(3,"Nucellus",(iii),"Seed coat"),(4,"Funiculus",(iv),"Seed"):}