The increasing concentration of fat-soluble toxins at successive trophic levels is known as ________.
a. trophic cascade
b. biomagnification
c. energy flow
d. gross primary productivity
b. biomagnification
The increasing concentration of fat-soluble toxins at successive trophic levels is known as biomagnification. It can adversely affect any number of organisms, but particularly those at the highest trophic level.
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A human body has about ________ cells.
A) 3.2 billion B) 20,600 C) 30 trillion D) 10 to 100 million
Imagine that you are studying a new species. As you examine the circulatory system, you note that the diameter of the vessels grows smaller and smaller as you move farther from the heart, but the blood is always contained within vessels. If you want to place this new species into a group whose membership is solely based on whether the animals included share this described type of circulatory system, which animals would be included in this group? Check all that apply.
A. fish B. housefly C. frogs D. all mollusks
To help identify phylogenetic relationships scientists use
To help identify phylogenetic relationships scientists use
Naked capsid animal viruses are commonly released from the infected cell by ________, a process the host cell does not survive.
A. budding B. lysis C. endocytosis D. membrane fusion E. exocytosis