Which of the following is not true of acanthostega?
it was aquatic.
it had gills.
it had four limbs.
it laid shelled eggs.

The correct answer is D. It laid shelled eggs.

Explanation

Acanthosega was one of the first existing amphibians on earth, it had physical characteristics of fish and land animals such as a large head and a tail with an elongated fin, it also laid eggs when it reproduced as amphibians and similar to these eggs did not have shell; between the terrestrial features he had four legs with eight fingers each that allowed it to move, a large jaw with teeth, eyes located on the sides of its head, and lungs that allowed him to breathe optimally. However, it is said that IT was more bound to the life of the water since its legs were not strong enough to support the weight of its body during long journeys, and it also had soft skin and needed to moisten it often to contribute to the breathing process by absorbing oxygen from it. So, the correct answer is D. It laid shelled eggs.