If a planet is 15 times larger than Earth will Life on the planet be 15 times larger ?
Depends on the mass and density of the planet - lower and life could be larger, higher and life could be larger. There is only so much structural strength to a given design. For instance: bones on Earth can only support so much weight, over the limit and the animal is crushed by it own weigh and suffocates.
Animal in a water environment can be really huge since water acts to buoy them - to support them.
On land the Indian elephant is the largest animal that can exist in our current gravity regime.
There is no coherent or scientific argument which allows the dinosaurs to exist as land animals - unless gravity was far less then than today. (nor could they exist today as they lived in an environment with far higher oxygen content.
The Problem with Big Dinosaurs - http://dinosaurtheory.com/big_dinosaur.html
Not necessarily, but probably 15 times heavier, which would be a MAJOR problem for Madam Benghazi.
“Larger” or fifteen times as MASSive? If it’s the latter then everything would be functioning at 15 g’s. That’s “can’t lift a finger or even breath” territory for an Earthling. But there’s abundant life in ocean depths where exposed terrestrials would be crushed and in other environments you’d assume were totally lethal. So based on how life can adapt on Earth one shouldn’t assume a planet has to be exactly like Terra to support some form.
Hmmm. Maybe 1/15 as tall.