What might make the winter profile for oxygen concentration in winter appear more like the fall profile?
A) a lack of ice formation on the surface and few decomposers at the lake bottom
B) ice formation on the surface and few decomposers at the lake bottom
C) a lack of ice formation on the surface and increased numbers of decomposers at the lake bottom
D) ice formation on the surface and increased numbers of decomposers at the lake bottom
B
You might also like to view...
BRCA1 and BRCA2 are considered to be tumor-suppressor genes because _____
A) they prevent infection by tumor viruses that cause cancer B) their normal products participate in repair of DNA damage C) the mutant forms of either one of these prevent breast cancer D) the normal genes make estrogen receptors E) they block penetration of breast cells by chemical carcinogens
Which statement is NOT true?
a. Migration leads to genetic variation. b. Dominant genes always occur more frequently in a population than recessive genes. c. Nonrandom mating may result in changes in gene frequency. d. The Hardy-Weinberg law applies to large, stable populations. e. Crossing over increases variation.
A Mendelian cross for a three-gene trait is expected to yield ________ F2 genotypes
A) 4 B) 16 C) 27 D) 64 E) 265
What do scientists consider when they perform a cladistic analysis?
a. only the DNA of organisms b. all traits of organisms c. derived characters d. only physical similarities