I would say b or at least that’s what it was on my test
Ostrich eggshell is composed of 96% crystalline calcite and 4% organic material, mostly proteins. The thickness is made up of three different layers that vary in structure and thickness. The hardness of the shell is 3 on the Mohs scale. Pretty solid!
Threatened is the definition used when describing a species at risk of extinction
I think it’s the first one parasitism...
Answer:
Cellular organization.
Reproduction.
Metabolism.
Homeostasis.
Heredity.
Response to stimuli.
Growth and development.
Adaptation through evolution.
Explanation:
Hope this helps.