If you coil the wire around and around, it will make the magnetic force stronger, but it will still be pretty weak. ... The strength of an electromagnet can be increased by increasing the number of loops of wire around the iron core and by increasing the current or voltage.
Thyroxine is not produced.
thyroxine help for growth and methabolic rate
The classification categories from most to least inclusive: kingdom, phylum, class, order, family, genus, species.
If two organisms are in the same phylum, they must also be in the same kingdom, as a phylum is a part of a kingdom. They can be in different classes and/or orders.
The answer is B: it creates offspring from parents