Answer:
A group in which a star is classified according to its spectrum.
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Answer:
Osteon
Explanation:
Bone tissue may be of two types; compact bone tissue that form the outer hard covering of bones and spongy bone tissue that form inner soft portion of bone. Osteon are found in compact bone.
Osteons are cylindrical structures composed from clustre of Osteocytes and layers of extracellular matrix around a central canal connected by canaliculi for the transportation of blood. The haversian canal is surrounded by lamella that comprises the osteon. Osteons run parallel to long axis of bones and present in bones of many mammals, reptiles and birds. In some bones the stress or pressure in applied from few directions and osteons are aligned in that direction so they provide protection from bone bending or fracturing from compressive forces.
Answer:
Mutualism between fungi and coniferous trees is most common in the forest biome.
Explanation:
Beneficial interaction between two organisms of two different species in which both the organisms take benefit from each other in some way from this interaction. This beneficial interaction is called mutualism. Fungi and coniferous trees form interaction which is beneficial for both the species. In this interaction, the fungi help in the production of new root tips and plant provide shelter and nutrition to the fungus.
Answer:
Archaea: cells do not contain a nucleus; they have a different cell wall from bacteria. Eukarya: cells do contain a nucleus.
