An endoskeleton made up of hard plates beneath the skin is a characteristic of the echinodermata phylum. Organisms under the phylum echinodermata have tight interlocking plates that form their endoskeleton. Sea urchins, starfishes and sea cucumbers are examples of echinoderms.
Polyploidy is a major force in the evolution of both wild and cultivated plants. ... Some of the most important consequences of polyploidy for plant breeding are the increment in plant organs
I'm not sure but it might be C
It might be. In general, parental or guardian permission should be sought before seeking the assent of a child, particularly in more than minimal risk research, unless the requirement for obtaining parental or guardian permission can be waived. There might be some cases, however, involving minimal risk research, where it would be reasonable to seek child assent prior to seeking parental permission.
