El Niño is a recurring weather phenomenon

that
a. increases global warming.
b. stabilizes world climates.
c. produces a fluctuation in global weather.
d. depletes the ozone layer.
e. increases oceanic productivity


C

Biology & Microbiology

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In vertebrates, external fertilization (select all correct choices):

A. is common among mammals. B. cannot occur in marine (salt water) conditions. C. is found in some fish and amphibians. D. involves releasing gametes directly into a wet environment. E. is a form of asexual reproduction.

Biology & Microbiology

The process by which chromosomes fail to separate during meiosis is called ____

a. aneuploidy

b. trisomy c. monosomy d. nondisjunction e. polyploidy

Biology & Microbiology

The fact that most segmentation genes code for ____ indicates that these protein products are ____ that regulate the

expression of other genes. a. homeobox genes; genetic switches b. transcription factors; genetic switches c. transcription factors; inducers d. maternal effect genes; protein switches e. hormones; signaling molecules

Biology & Microbiology

The probability of a hit is increased with _____ oxygen and _____ LET radiation.

a) high, low b) low, low c) high, high d) low, high

Biology & Microbiology