Simple diffusion requires:
A) protein channels. B) a concentration gradient.
C) the use of energy. D) carrier proteins.
Answer: B
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A secondary spermatocyte
a. is haploid with unduplicated chromosomes. b. is haploid with duplicated chromosomes. c. is diploid with unduplicated chromosomes. d. is diploid with duplicated chromosomes. e. none of these answers.
A process that results in antibody production by the recipient induces a form of immunity called ________
Fill in the blank(s) with the appropriate word(s)
As cell division begins, DNA in the nucleus condenses to form ________.
A. chromatin B. cytosol C. genes D. chromosomes E. RNA
The right and left hemispheres remain in constant communication primarily through commissures in the
A. pituitary. B. corpus callosum. C. medulla oblongata. D. hypothalamus. E. pons.