What were the genotypes
of the two plants crossed
in the F1 cross?

common management practices in dairy and poultry farming are: (i) proper shelter facilities and their regular cleaning. (ii) some basic hygienic conditions such as clean water, nutritious food, etc. (iii) animals are kept in spacious, airy, and ventilated place.

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link:

the electromagnetic energy from the sun arrives in the form of visible and invisible light.