Which of the following statements is true? Carnivores get their energy directly from the sun.
Decomposers add nutrients back to the soil.
Cacti are found in the tropical rainforest.
All food chains start with the consumer.

Which scientific design has both practical limitations and limitations due to scale? studying the effect of bleach on the growth of mold spores exposing cultures of duckweed to different intensities of light observing the replication of dna molecules with a hand lens using colored marbles to model a cross between two colors of rabbits