Which factor is contributing to the worldwide decline in amphibians?
A. toxic chemical pollutants
B. habitat deterioration
C. fatal infections
D. introduction of exotic species
E. All of these are contributing factors.
Answer: E
You might also like to view...
What type of covalent bond between amino acid side chains (R-groups) functions in maintaining a polypeptide's specific three-dimensional shape?
A) ionic bond B) hydrophobic interaction C) van der Waals interaction D) disulfide bond E) hydrogen bond
Below is a high-magnification photomicrograph of an organism similar to one you observed in this exercise. Each rectangular “box” is a single cell. What normally visible organelle is absent from each cell that makes it “prokaryotic?”
What will be an ideal response?
Four of the five answers listed below are events occurring during mitosis. Select the exception
a. chromosome replication b. division of centromere c. lining chromosomes up at the cellular equator d. spindle microtubules attach to the centromeres e. chromosomes migrate to opposite ends of the cell
One simple thing that you can do to help safeguard the environment is to eat a diet consisting only of
A) producers. B) primary consumers. C) secondary consumers. D) a mix of producers and consumers.