The insulin receptor is an example of a(n) ____
a. G-protein-coupled receptor
b. hydrophobic receptor
c. hormone receptor
d. receptor tyrosine kinase
e. ion channel receptor
ANSWER: d
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In the ABO multiple allele system, there are the following combinations of genotypes and phenotypes:A
4 genotypes, 4 phenotypes B. 4 genotypes, 6 phenotypes C. 6 genotypes, 6 phenotypes D. 6 genotypes, 4 phenotypes E. 3 genotypes, 4 phenotypes
Which of the following describes an organ system within an organism?
a) a collection of organelles that work together b) a group of cells that work together to perform a function c) a number of organs that interact to maintain homeostasis d) a set of different tissues positioned near each other
Linnaeus lumped all of the worm-like animals into the category Vermes (Vermis is Latin for worm). Is this a valid classification scheme?
A. No, because some worms are protists. B. Yes, because all worms are members of the same phylum. C. No, because the worm-like body plan has appeared many times through evolutionary history and is not a useful trait for classification. D. Yes, because all worm-like animals are more closely related to each other than they are to other animals.
Mitochondria transfer ________ energy from ________ to ATP; chloroplasts transform ________ energy into the chemical energy of ATP
A) chemical; food; light B) food; light; chemical C) light; food; kinetic D) food; light; nuclear