To be useful to scientists, a hypothesis must be ________; in other words, the hypothesis must be able to be confirmed or discredited.
Fill in the blank(s) with the appropriate word(s).
testable
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The accessory pigment phycoerythrin is dominant in the ________ group of algae, which mostly lack flagella, have multicellular lifestyles, and occur in marine waters
Those in particular which deposit calcium carbonate in coral reef systems are classified as ________ algae. A) chlorophyte / coralline B) chlorophyte / rhodolithic C) rhodophyte / coralline D) rhodophyte / rhodolithic
Animals, like fiddler crabs, that are busiest at dawn or dusk are termed:a
crepuscular. b. nocturnal. c. diurnal. d. lunar. e. asynchronous.
During the luteal phase a low level of progesterone and estrogen will bring about
A. a spike of the luteinizing hormone causing the oocyte to be ovulated. B. the enlarging of the breast tissue in order to prepare for lactation. C. the development of a secondary oocyte. D. the disintegration of the endometrium and the rupturing of the blood vessels. E. the thickening of the endometrial lining in preparation for the implantation of a zygote.
What is the main function of the molecule shown in the figure above?
A. Chemical messenger B. Energy currency C. Hereditary information D. Metabolism of fats E. Protein synthesis