In a food pyramid what percent of energy passes between Trophic levels?
(Jonathan Reveal)
a =45%
b =10%
c =90%
d =30%

Answer

In what part of the ocean can we find the most important ocean life? (Dora
Juarez)
a) along the abysal plain.
b) on mid-ocean ridges.
c) on the continental shelf.
d) along the continental slope.

answer:

Which of the following is a terrestrial life zone?  (Shawnele Cox)
a)biomes
b)ecosystems
c)communities
d)ecotones
e)all the above

answer:

The clearing of wildlands liberates perhaps another (Susana Palma)
A) 70 million metric tons of nitrogen
B) 70 billion metric tons of nitrogen
C) 700,000 metric tons of nitrogen

No answer given

___________ is a symbiotic relationship in which interacting species benefit
in various ways. (Mili Gonzales)
A.  Mutualism
B.  Rhizobium
C.  Ectoparasites
D.  Epiphytes

Answer:

Which of the following contributes to human respiratory diseases such as
asthma and bronchitis and can also damage buildings, metals, and statues.
(Chloe Downing)
a) carbon dioxide
b) acid deposition
c) photochemical smog
d) thermal inversion

Answer:

Which of the following countries is not projected to have a natural population
decrease (more deaths than births):  (Chloe Downing)
a) Russia
b) Italy
c) Germany
d) United States

Answer: