test
The part of bone you are asking about is called compact bone, or cortical bone.
The shell of microbe may be referred to as a test.
The exoskeleton
frame structure
Well, It protects the cell as it main job, and also gives it some shape, but the rigid cell walls of the cell also keep the plant sturdy, but in that case, it would be like more of a hard shell of a crab, which keeps it safe and gives it structure.
Chitin
Yes, the cool and rigid shell is the asthenosphere.
The Earth's outermost sphere is the Lithosphere. It's the rigid outermost shell of the Earth.
shelled protozoans.
The Earth's outermost sphere is the Lithosphere. It's the rigid outermost shell of the Earth.
Yes. Well, more or less rigid.
The lithosphere is the rigid outermost shell of a rocky planet. On Earth, it comprises the crust and the portion of the upper mantle
Yes
No, the rigid outer covering of arthropods is usually called the exoskeleton. In biology the mantle is a major anatomical component of a different phylum - molluscs, the tissue which contains the internal organs and in many molluscs responsible for secreting the mineralized outer shell.
it will have rigid spike like things on the back of there shell:)
Yes. Well, more or less rigid.
No. A tectonic plate is a segment of the rigid rocky outer shell of the Earth composed of the crust and the brittle uppermost mantle.