Cite various instances of how flowers and the pollination process have "coevolved."
What will be an ideal response?
Answers may vary. The appearance and aroma of flowers are related to the pollination process. Wind pollinated flowers are not usually very showy, whereas flowers that are insect-pollinated or bird-pollinated tend to be colorful in order to attract their pollinators. Night blooming flowers attract nocturnal animal or insect pollinators. Nocturnal bloomers are not usually very colorful, but do tend to have a stronger aroma to attract pollinators in the dark. Another method of attracting pollinators that has evolved in some plants is the production of nectar in glands near the ovary region. Bee pollinated flowers are usually yellow or blue and have ultraviolet shadings that lead the pollinator to the location of nectar.
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Stem cells (unspecialized cells) that develop into bone cells have undergone which type of process?
A. Involution B. Convergent extension C. Embryonic development D. Cellular differentiation E. Cellular respiration
When root cells release the hormone abscisic acid (ABA), what is the result? a. Solutes exit guard cells, causing stomata to close
b. Epidermal cell secretions increase. c. Solutes enter guard cells, casing stomata to open. d. Root hairs grow in the direction of water and nutrient availability.
Valparaiso, Chile, is the city closest to Antarctica. With reduced CFC use, what health condition will probably change, and how?
A) There will be an increase in cataracts. B) There will be fewer bacterial infections. C) There will be an increase in lung cancer. D) There will be fewer skin cancers.
The two chains of nucleotides in a DNA molecule are held together by:
A) covalent bonds. B) ionic bonds. C) hydrogen bonds. D) hydrophobic interactions. E) peptide bonds.