One year. It takes 365 days for Earth to orbit the sun.
note:
Gymnosperms possess several key evolutionary innovations compared to earlier groups such as the clubmosses and ferns. They produce sperm-containing pollen, which is carried through the air by the wind to the female. This innovation has freed these plants from the need for water for sexual reproduction.
Answer:
B) Post-zygotic factors prevented successful reproduction.
Explanation:
Postzygotic factors may influence the formation of the fertile offspring.
The postzygotic barriers basically involves the formation of the hybrid organisms which do not survive past the embryonic stages i-e hybrid inviability / the hybrid creation that is unable to form the offspring i-e sterile.
So , in the given scenario option B )Post-zygotic factors prevented successful reproduction is the right answer .
<span> The answer is <span>centriole</span>
The majority of cells have mitochondrion as they need them for their respiration. Chloroplast is the structure plants use to produce their organic matter, the vacuole is very developed in plant cells and is central where as you usually have many vacuoles in animal cells, and the centriole is usually present in animal cells only as well as the wall of cellulose that wraps up the plant cell.</span>
