wiz-icon
MyQuestionIcon
MyQuestionIcon
6
You visited us 6 times! Enjoying our articles? Unlock Full Access!
Question

The arrangement of (i) cells and (ii) nuclei in a typical embryo sac is -


A

(i)(3 + 1 + 3) & (ii)(3 + 2 + 3)

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B

(i)(3 + 2 + 3) & (ii)(3 + 1 + 3)

No worries! We‘ve got your back. Try BYJU‘S free classes today!
C

(i)(3 + 1 + 3) & (ii)(3 + 1 + 3)

No worries! We‘ve got your back. Try BYJU‘S free classes today!
D

(i)(3 + 2 + 3) & (ii)(3 + 2 + 3)

No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A

(i)(3 + 1 + 3) & (ii)(3 + 2 + 3)


A typical embryo sac has 7 cells and 8 nuclei. There are 3 antipodal cells at the chalazal end, one central cell and 3 cells in the egg apparatus (one egg and two synergids). Hence, the cellular arrangement is 3+1+3. The antipodals and the three cells of the egg apparatus have one nucleus each. The central cell however has two free nuclei known as the polar nuclei. Therefore, the arrangement of nuclei is 3+2+3.


flag
Suggest Corrections
thumbs-up
1
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Female Reproductive Part
BIOLOGY
Watch in App
Join BYJU'S Learning Program
CrossIcon