Meiosis in females is completed
A. at conception. D. at fertilization.
B. at ovulation. E. prior to conception.
C. at puberty.
D
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Which of these is not an example of coevolution between flowers and pollinating bees?
A. Bees have tongues to lap up nectar. B. Some bees are hairy to collect and carry pollen. C. Flowers have ultraviolet markings visible to bees but invisible to most other insects. D. Some flowers are bright red with long tubes to hold nectar. E. Bees have strong preferences for particular types of flowers and remember where the plants are located.
Which MAP kinase was found to be a signaling molecule for oocyte maturation in mice?
a. Mek and Raf b. Ras 1 and ERK 2 c. Raf 1 and Raf 2 d. Mek and ERK2 e. ERK 1 and ERK 2
Which wavelengths of the electromagnetic spectrum are the only ones used for photosynthesis?
a. from about 300 to 600 nm b. from about 400 to700 nm c. from about 500 to 800 nm d. from about 600 to 900 nm
Given the sequence of one strand of a DNA helix (below), provide the sequence of the complementary strand and label the 5? and 3? ends
5?-GCATTCGTGGGTAG-3? What will be an ideal response?