The primary nitrogenous waste product of aquatic organisms is ________
Fill in the blank(s) with correct word
ammonia
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The Z lines in skeletal muscle are composed of ____
a. discs to which thin filaments are anchored b. stacked thick filaments along with the parts of thin filaments that overlap both ends c. thin filaments but no thick filaments d. thick filaments but no thin filaments e. stacked thin filaments along with parts of thick filaments that overlap both ends
Suppose that you performed a version of the Hershey and Chase experiment, this time using 32Plabeled
viruses that insert their double stranded DNA into the DNA of the cells that they infect. The viral DNA is then treated as part of the cell's own DNA and is replicated during DNA replication and passed on to daughter cells when the cell divides. You infect a population of cells with the 32P-labeled viruses, then let the infected cells go through two generations of cell divisions. If you then examine the cells, you should find 32P-labeled DNA in
a. none of them. b. about of them. c. about of them. d. about of them. e. all of them.
When the population size of a prey species increases, the birthrate of a predator species should also increase
Indicate whether the statement is true or false
The simplest animals to display cephalization and centralization of the nervous system are
A) sponges. B) flatworms. C) cnidarians. D) echinoderms.