True or false? All pollutants are synthetic chemicals
Indicate whether the statement is true or false
F
Manure from hog confinement facilities is an example of a natural product that contaminates land and water when distributed in excess.
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Which of the following statements regarding the gene FoxP2 is NOT true?
A. FoxP2 is a member of a large family of evolutionarily conserved transcription factors that play an important role in development. B. Individuals (humans) with mutations in FoxP2 often have problems with speech and language. C. A "molecular clock" analysis of the FoxP2 gene in chimpanzees and humans strongly suggests that the evolution of novel function in FoxP2 of humans led to the evolution of language. D. FoxP2 is involved in the development of many tissues, so it must have plieotropic effects (or "additional functions that are independent of language ability").
Which of the following surrounds and protects the brain in all vertebrates?
a. pharynx b. neural crest c. oral hood d. notochord e. cranium
Whe considering receptors for hormone molecules, we can say that, in general, _________.
Fill in the blank(s) with the appropriate word(s).
A patient has come to you for a second opinion. "I have these mysterious lumps in my right armpit," he says, "The other doctor says we may have to remove them. What do you think?"You notice red scratches on the patient's right arm. "You must have a new kitten. Cat scratch disease, from the bacterium Bartonella," you say, "And we certainly won't remove those lumps, they are really important! Those are your..."
A. "thymus glands, where naive B and T cells encounter antigens and become activated." B. "lymph nodes, where naive B and T cells encounter antigens and become activated." C. "lymph nodes, where T-cell receptor genes are rearranged as T cells mature." D. "spleen, where hematopoietic stem cells produce lymphoid and myeloid progenitors."