Which of the following is not a characteristic of animals (kingdom animalia)?

a)
they can be eukaryotic and multicellular.

b)
most are multicellular.

c)
some are autotrophs.

d)
some lack a backbone.

e)
some are eukaryotic and unicellular.

Which of the following conclusions can be drawn

Which member of the following food chain will be least affected by ddt, a pesticide water pollutant, if bio-magnification is occurring? algae> zooplankton> crayfish> leopard frog> large mouth bass

The greenhouse effect a. something that has occurred for millions of years b. an unnatural phenomenon caused by humans that maintains earths temperature range. c. the results of the differences in the angle of the suns rays d. an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere