Which aquatic ecosystem is characterized by ocean tides and river flow stirring up nutrients and producing abundant life?
A) the pelagic zone
B) the intertidal zone
C) estuaries
D) wetlands
E) coral reefs
Answer: C
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Indicate whether each statement is true or false and then provide the explanation for why the statements are either true or false. Receptors for signaling molecules are always integral membrane proteins on the surface of responding cells
What will be an ideal response?
A body of learned behavior that is socially transmitted among individuals and passed down from one generation to the next is known as ____
Fill in the blank with the appropriate word.
Given that humans shifted from hunter-gathers to an agriculturally based society within the last 10,000 years does NOT mean that ________
A) we cannot expect evolution by natural selection in human populations to have kept pace with our changing way of life B) humans still retain many, if not most, of the features that made us well adapted to living in the hunter-gatherer societies of the stone age C) we can use knowledge of the differences between our current lifestyle and the lifestyle of our pre-agricultural lifestyle to better understand both the peculiarities of humans and risks associated with our modern lifestyle D) humans are unique in that we have the capacity evolve by natural selection much more rapidly in response to changes in our environment than other organisms do
What does it mean if a plant is dioecious?
A. The sporophyte and the gametophyte are on the same plant. B. There are separate male and female sporophytes. C. Pollination and fertilization are separate events. D. There is double fertilization of the embryo.