Some key reasons for partially developed offspring:
• Genetic issues, parents sexual organs incorrectly formed, in turn malforming the offspring
• Pollution, parents consuming something they shouldn't have while the offspring was developing
• Breeding between relations; accidently mating with a brother or sister, in turn causing defects as many of the genes are the same
I believe the answer is echinodermataechinodermata and Chordata have a very similar embryonic development; tirhe first opening (the blastopore) becomes the anus, while in protostomes it becomes the mouth and several similarties in the formation of skeleton.It is predicted that Echinodermata and Chordata evolved from the same ancestor
Answer:
Ocean water is colder at poles because there sun rays fall in slanting motion, giving less amount of heat.
But on equator and equatorial region, sun rays are Straight and fall directly over it, giving more amount of heat than that on poles.
<span>A watershed is a region of land that drains into a river, a river system, or another body of water. So in this case, tributaries is the answer.</span>