Which statement about ecosystems is true?
a. ecosystems are always a few square meters at most.
b. ecosystems are exactly one square kilometer.
c. ecosystems are always larger than a biome.
d. ecosystems are always smaller than a biome.

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

Iguanas need to live in a habitat that is very warm, so the pet store warms their enclosures with "basking lights" which act as an artificial sun. describe how the three methods of thermal energy transfer may take place within the iguana's enclosure.

Pl which diagram illustrates prophase?