An animal that is attached to the substrate and cannot move from one place to another is said to be
A. rooted.
B. sessile.
C. sedentious.
D. fixated.
B. sessile.
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The boreal forest could best be described as what type of forest?
a. deciduous b. thorn c. evergreen coniferous d. broad-leafed e. shrub
All of the following will lead to the production of highly concentrated urine & less urine volume EXCEPT:
A. high levels of ADH B. increased levels of ANP (Atrial Natiuretic Peptide) C. increased levels of renin D. stimulation of the osmoreceptors in the hypothalamus E. increased levels of angiotensin II
In female mammals, the inactive X chromosome in each cell
A) can be activated if mutations occur in the active X chromosome. B) is broken down, and its nucleotides are degraded and reused. C) is absorbed and used in energy production. D) becomes a Barr body.
For some proteins, small molecules are integral to their structure and function. Enzymes can synthesize some of these small molecules, whereas others, called vitamins, must be ingested in the food we eat
Which of the following molecules is not classified as a vitamin but does require the ingestion of a vitamin for its production? (a) retinal (b) biotin (c) zinc (d) heme