Because of its antiparallel nature, DNA is often referred to as a ________.
Fill in the blank(s) with the appropriate word(s).
double helix
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Which of the following statements about oocytes and ovulation is correct?
a. the production of primary oocytes continues in women from the onset of puberty until the onset of menopause b. meiotic divisions are complete at the time of ovulation c. at ovulation, the structure released from the follicle includes a secondary oocyte and polar body d. all of the statements are correct
In meiosis, recombination occurs _______________
A. during prophase I and II and involves exchange of chromosome fragments between all four chromatids B. only during prophase I and involves exchange between chromatids of homologous chromosomes C. only during prophase I and involves exchange of chromosome fragments between sister chromatids D. during prophase I and II and involves exchange of chromosome fragments between sister chromatids
Focusing on an object requires the interaction
of the ___ and the ___.
a. ciliary muscles--lens b. ciliary muscles--cornea c. ciliary muscles--iris d. iris--pupil e. cornea--pupil
Mosquito-transmitted roundworms cause a tropical disease called ____
a. trematodiases b. human echinococcosis c. lymphatic filariasis d. onchocerciasis e. dracunculiasis