The validity of a prediction in the scientific method is determined by experimentation or observation
Indicate whether the statement is true or false
TRUE
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Reabsorption of water in the hindgut of insects is controlled by which of the following?
A) osmotic gradients created by ion pumps B) selective absorptive processes that take place in the Malpighian tubules C) ion concentration of hemolymph D) osmoregulators in the rectal gland
The agarose used in electrophoresis
A. interacts electrically with the DNA. B. chemically binds to the DNA. C. acts as a sieve. D. selectively sorts recombinant DNA from host DNA.
The polar ice caps are not considered biomes because they
a. lack any major plant communities. b. do not sustain animals and bacteria. c. are located outside of areas that can be considered as biomes. d. are too cold for any life. e. melt and refreeze on a regular basis.
In biology class, Joan makes careful observations using a microscope of stained cells undergoing meiosis. During which phase of meiosis will she see homologous chromosomes first pair up?
A) anaphase I B) prophase I C) metaphase II D) metaphase I