A carnivore, such as a lion, that mainly eats herbivores, such as zebras and wildebeests, would be placed at which trophic level?
What will be an ideal response?
As a secondary consumer, the lion would be in the third trophic level.
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Based on this information, is herbicide resistance an adaptation in this population?
a. Because it gives organisms an advantage in terms of survival and reproduction when herbicides are sprayed, it would be considered an adaptation. b. Because plants that don’t have herbicide resistance produce more offspring, it would not be considered an adaptation. c. Selection pressures vary with the environment, so this trait would be considered an adaptation in certain environments. d. Because this trait is only advantageous in certain environments, it would not be considered an adaptation
Which of the following statements regarding hypersensitivity are true? (Check all that apply.)
_____ The acceptance of self cells is known as immunological tolerance. _____ Allergies are caused by IgG secretion in response to antigens. _____ Autoreactive B cells produce autoantibodies causing inflammation. _____ Itchy welts or hives could be called a local anaphylaxis. _____ Delayed hypersensitivity is mediated by TH cells and macrophages.
Which of the following statements is NOT part of Darwin's theory of natural selection?
a. There is some variation within a population. b. Competition between populations increases variation. c. Individuals with advantageous characteristics tend to survive. d. Survivors pass their advantageous characteristics to their offspring. e. Most species overproduce offspring.
Blood vessels called ___ carry blood back to the heart.
What will be an ideal response?