Why do big baleen whales, such as the blue whale, eat small creatures such as krill?
a) krill are highly abundant because they are near the bottom of the food web, so there is more biomass to support large animals
b) they are so large and heavy that they cannot swim fast enough to catch larger prey
c) baleen whales feed on the ocean floor, where krill live in the sediment
d) krill contain critical nutrients that the big whales need to survive
e) Only big baleen whales are fast enough to catch krill in large numbers
A
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Critical Thinking
What does the accompanying age structure diagram imply about the economic productivity of this country?
What will be an ideal response?
What explains the large percentage of South Asians along Guyana's coast?
A) legacy of indentured servitude under nineteenth century British rule B) legacy of U.S. involvement in Indochina in the 1950s-1970s C) legacy of Soviet involvement in Afghanistan in the 1970s D) legacy of U.S. involvement in South Asia E) legacy of Japanese Empire expansion through Southeast Asia
?Most of the heat held in the atmosphere by greenhouse gas pollution since the 1970s has ended up in the oceans.
Answer the following statement true (T) or false (F)
The former late Paleozoic supercontinent is known as ________
A) Pangaea B) Pandomonia C) Pancakea D) Panatopia