What percentage of all living and fossil animals are invertebrates?
a. 10%
b. 50%
c. 70%
d. 90%
ANS: D
Invertebrates are animals that do not have an internal skeleton to attach muscles. They tend to be soft
bodied, but some have developed hard, protective coverings. Information can be found in the section
Invertebrates Are the Most Successful and Abundant Animals.
You might also like to view...
This diagram features a
A) cyclone, southern hemisphere.
B) cyclone, northern hemisphere.
C) anticyclone, northern hemisphere.
D) anticyclone, southern hemisphere.
Energy efficiency is a measure of
A. Total energy consumed over a year divided by time spent B. Energy produced compared to energy consumed C. Energy used per unit of time D. Energy stored in a unit of fuel E. Heat produced by a barrel of fuel
Carboniferous age reefs differed from those of the Devonian in that they were much more massive
than the older reef structures. Indicate whether the statement is true or false.
There is a much faster nutrient cycling rate on land from producers to consumers than in the ocean
Indicate whether the statement is true or false