If a scientist creates a new rock-like substance in a laboratory, why wouldn’t this type of material be classified as a true mineral? A. It’s not a naturally occurring substance.
B. It would not be hard enough.
C. It’s an inorganic substance.
D. It’s too new to be a mineral.

Which statement best describes a keystone species? o a. it has littlelmenetic variation. it has an extremely high population. 0 b. 0 c. it remains unaffected by all environmental changes. od. it has a strong influence on the ecosystem. 0 e. it's the first species to populate a new ecosystem.

What are some possible short and long term medical concerns for crew members on longer space exploration trips

Plants that have reproductive structures called cones are?