1. Occurs when cell division is across the whole egg
2. is where a gastrula forms mesoderm from mesenchymal cells
3. occurs when zygotes have very little yolk
4. occurs when cell division is restricted to the animal pole
2007-08-29 03:44:55 · 4 answers · asked by Irosh Bandara 5 in Science & Mathematics ➔ Biology
I would have to pick 3. Although 1 looks good on the surface, I think it is an answer to distract you into thinking about incomplete cleavage (where you get muliple nuclei in the same cytoplasm).
2007-08-29 04:16:14 · answer #1 · answered by N E 7 · 1⤊ 0⤋
The term "holoblastic" refers to complete division of cell.Hence the answer should be #1
It is axiomatic that complete cleavage would occur when there is no yolk or very little yolk.
2007-09-01 03:02:35 · answer #2 · answered by Ishan26 7 · 0⤊ 1⤋
It´s no.1. I have never heard of this term but I can look up Merriam Webster´s dictionary. May I suggest that you invest in one too?
2007-08-29 10:53:13 · answer #3 · answered by Anonymous · 0⤊ 1⤋
The correct choice is #3.
See:
http://en.wikipedia.org/wiki/Cleavage_%28embryo%29#Holoblastic
2007-08-29 10:50:06 · answer #4 · answered by сhееsеr1 7 · 0⤊ 1⤋