Biomagnification is a significant problem in aquatic communities. Levels of chemicals magnify (increase or accumulate) at each new link in a food chain. Use the following information to estimate the level of chemical X in a large-mouth bass. One alga can accumulate 1 unit of chemical X. Each copepod eats 15 algae. A minnow consumes 10 copepods, each large-mouth bass consumes 20 minnows.
A. 3,000 units
B. 150 units
C. 30 units
D. 20,000 units
E. 300 units
F. 15 units
G. 20 units
Answer: A
You might also like to view...
As electrons move through the proteins that reside between Photosystem II and Photosystem I, they lose energy. What is that energy used for?
a. The energy is used to pump water from the stroma of the chloroplast, maintaining osmotic balance. b. The energy is used to harvest photons from sunlight on the leaves of the plants. c. The energy is used to move hydrogen ions from the stromal side of the membrane to the thylakoid lumen. d. The energy is used to break water to replenish lost electrons in an earlier step of the process.
Four of the five answers listed below can be used when describing fungal reproduction. Select the exception
a. budding b. pollen c. dikaryotic d. zygospore e. aerial hypha
What initiates the formation of an endospore?
A) stimulus to reproduce B) transfer of genetic material C) injury to the cell D) depletion of nutrients
The cytoplasmic membranes of ________ contain unbranched phospholipids and proteins.
A. archaeal cells B. bacterial cells C. eukaryotic cells D. both bacterial and eukaryotic cells E. archaeal, bacterial, and eukaryotic cells