Aquaporins are
A) water transport proteins.
B) molecules that prevent water from crossing a membrane.
C) enzymes involved in the generation of water within cells.
D) cations bound to water molecules.
Answer: A
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Reciprocal translocations can affect gene dosage because:
A. the genes involved in the translocation are nonfunctional. B. the two chromosomes involved in the translocation may not assort together during meiosis. C. the two chromosomes involved in the translocation always assort together during meiosis. D. reciprocal translocation involves the duplication of one set of genes and the deletion of another set of genes. E. none of these
True or False: Some plant nutrients are more mobile in soil than others
A. true B. false
What is the ?2 value for a chi-square test for goodness of fit of the null hypothesis?
In Drosophila, singed bristles (sn) and carnation eyes (car) are both caused by recessive X-linked alleles. The wild-type alleles (sn+ and car+) are responsible for straight bristles and red eyes, respectively. A sn car female is mated to a sn+car+ male and the F1 progeny are interbred. The F2 are distributed as follows:
A) 0.5
B) 1.0
C) 2.0
D) 0.4
E) 20
In 2006, the greatest use of energy in the United States was _____
1.nuclear energy going to industry 2.natural gas for residential and commercial uses 3.petroleum used for transportation 4.petroleum used in industry