Question

What is NEMEC phenomenon??

Plzz explain it

My last question☺️

Leaving the app today =_=

Answer 1

Explanation:

Pollen embryo sacs are also called NEMEC PHENOMENON, as Nemec discovered them for the first time. According to Nemec, pollen embryo sacs are produced by the repeated divisions of vegetative nucleus while the generative nucleus degenerates.

Answer 2

Answer:

MATURED POLLEN EMBRYO SAC

Pollen embryo sacs are also called NEMEC PHENOMENON, as Nemec discovered them for the first time. According to Nemec, pollen embryo sacs are produced by the repeated divisions of vegetative nucleus while the generative nucleus degenerates.

Explanation:

Abnormal pollen-embryo sacs

In addition certain abnormal pollen-embryo sacs were also seen, showing the following types of organization:

(1) 8 nuclei forming an egg, two polars, and five antipodal cells.

(2) 4 nuclei forming an egg, two polars, and one antipodal cell.

(3) 4 nuclei forming a polar and three antipodal cells but no egg.

(4) 16 nuclei forming a 5- to 10-celled egg apparatus, one or two polars, and a few antipodal cells.

(5) More than 16 nuclei without any definite arrangement.