________ were the first vertebrates to live on land and they evolved from ________.
A. Mammals; reptiles
B. Reptiles; amphibians
C. Amphibians; fish
D. Amphibians; lancelets
Answer: C
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A scientist is studying a population of feral cats in his city. He notes that the r of this population is 1. What does this mean (assuming that he is evaluating population size on a yearly basis)?
A. that the population of feral cats doubles in size each year B. that the population of feral cats triples in size each year C. that the population of feral cats remains the same size from year to year D. that the population of feral cats decreases in size by 10% every year
Water loss through the stomata of leaves is called
A) bulk flow. B) transpiration. C) guttation. D) translocation. E) osmosis.
The three types of horizontal gene flow that occur in bacteria are __________, __________, and __________.
Fill in the blank(s) with the appropriate word(s).
A genomic condition that may be responsible for some forms of fragile X syndrome, as well as Huntington disease, involves ________
A) various lengths of trinucleotide repeats B) multiple inversions in the X chromosome C) multiple breakpoints fairly evenly dispersed along the X chromosome D) plasmids inserted into the FMR-1 gene E) single translocations in the X chromosome