Answer: Of all the branches of complex animals, sponges are the only group lacking TRUE TISSUE.
Explanation:
Horses sleep while standing, unless it is necessary for them to get REM sleep. The amount of REM sleep needed is not much, so they will spend most of their time when sleeping, standing.
I think. They will die if they do not find another source, depending what it is.
<span>Nuclear membrane, endoplasmic reticulum, Golgi apparatus, and vesicle</span>
