What are some arguments for conserving biodiversity?
What will be an ideal response?
The chapter outlines three general benefits and provides examples for each. Biodiversity benefits
humans directly. For example, a cancer drug found in the Pacific yew tree and genes from wild species
that may serve as sources for genetic variation in agricultural crops. Biodiversity is related to
ecosystem services, which benefit humans indirectly. For example, carbon sequestration. Finally, it is
argued that biodiversity has intrinsic value where emotional or spiritual connections to natural
landscapes and species enhance human existence.
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How can you recognize a reliable source of information?
A. By checking whether the information was peer-reviewed B. By checking whether the source of information is primary C. By checking whether the authors are well qualified D. All of the above are ways to check whether a source is reliable
One difference between gram-positive and gram-negative bacteria is that
A) gram-positive bacteria have more peptidoglycan in their cell walls. B) gram-positive bacteria have fimbriae but gram-negative bacteria do not. C) gram-positive bacteria are spiral-shaped, and gram-negative bacteria are either rod-shaped or spherical. D) only gram-negative bacteria can form endospores.
Which of these is a method evolved by angiosperms to attract pollinators to their flowers?
A. colorful petals B. scent C. nectar D. All of these are correct.
The carbon atoms in organic compounds typically form ________ with other atoms
A) nonpolar covalent bonds B) polar covalent bonds C) ionic bonds D) hydrogen bonds E) either ionic or hydrogen bonds