Leaf abscission:a
occurs as a response to increased temperatures in temperate climates.
b. occurs as a response to dry conditions in tropical climates.
c. involves the formation of a tendril at the base of the petiole.
d. occurs year-round on deciduous plants.
e. does not occur in conifers
b
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One way that the development of drug resistance in viruses has been reduced has been by the use of a cocktail of several drugs at high doses.
Answer the following statement true (T) or false (F)
Cells that can engulf foreign particles, and can ingest, kill, and digest most bacterial pathogens are called
A) red blood cells. B) phagocytes. C) reticulocytes. D) resistant cells.
Amphibians evolved directly from what ancestral organisms?
a. reptiles b. shelled invertebrates c. fishes d. soft-bodied animals e. marine invertebrates
One of your closest fish relatives is the coelacanth. Where is its equivalent to your forearm?
A. The gill arch extensions B. The claspers C. The operculum D. The pelvic fin lobe E. The pectoral fin lobe