The photosynthetic bacteria that form the basis of the food chain in the Great Salt Lake are classified as
A) carnivores.
B) herbivores.
C) secondary consumers.
D) omnivores.
E) producers.
E
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In optimizing foraging, birds often stop feeding in an area and move on, even though there are still some seeds left. What is the best explanation for this observation?
A. Other areas may have food at a lower density. B. They will leave some seeds to create the next generation of plants. C. The density of the food becomes low, so it will take too much energy to find. D. They are more likely to find a mate if they move around. E. They are safer from predators when moving.
Which of the following structures is common to plant and animal cells?
a. chloroplast b. wall made of cellulose c. tonoplast. d. mitochondrion e. centriole
What is the composition of the genetic material?
What will be an ideal response?
Critics of GM foods often cite the ________ as reason to be skeptical of the safety of GM foods
A) the in depth testing of DNA that makes it through the food refinement process B) fact that most GM foods are not directly consumed by humans C) vast number of studies conducted on the consumption of GM foods D) the extreme governmental oversight of GM food production