Which animal has tracheae but no lungs for respiration? a. cardinal b. grasshopper c. toad d. tuna

Chloroplasts and bacteria are in size. a. similar b. at different ends of the size range c. exactly the same d. none of these

Which of the following is not a benefit of genetically modified foods? a.pest-resistant crops b.herbicide-resistant crops c.plants that do not require water?

What two factors does carrying capacity compare? population size and resource use population growth and resource availability resource use and time population size and time