Imagine a very simple food chain in which orcas (killer whales) eat only sea otters, sea otters eat only sea urchins, and urchins eat only kelp (marine
algae). Orcas, sea otters, and urchins are the only significant consumers in
the system. To keep one ton of orca biomass fed, you would need about
ton(s) of kelp.*
1
10
100
1,000
1,000,000

How are the reproductive cycles of a fungus and a pteridophyte similar? a)both organisms form fruiting bodies that produce diploid seeds. b)both organisms produce haploid spores and exhibit diploid and haploid stages. c)both organisms reproduce sexually when two haploid hyphae fuse. d)both organisms exhibit a diploid stage and are only able to reproduce asexually.

Are the layers of rock above and below the coal older or younger?

Physical characteristics of down syndrome