The northern coniferous forest is characterized by
A) long and cold winters, short growing seasons, and conifers.
B) few grasses, moist soils, and trees that drop their leaves in the winter.
C) dry soils that lack vegetation.
D) fire-adapted plants.
E) tallgrass.
A
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Some genes such as that for ?-actin are expressed at relatively constant levels in tissues regardless of variations in the animal's condition. What do we call this type of gene?
A. transposable element B. steady state gene C. constitutive gene D. recombinant gene E. multifunctional gene
The discovery of identical plant and animal fossils by Alfred Wegener in 1915 on either side of the Atlantic Ocean is
evidence of ____.
a. analogous structures b. catastrophism c. plate tectonics
d. comparative morphology e. the great chain of being
Rheumatic fever is an autoimmune complication caused by a ________ infection.
a) Staphylococcus aureus b) Francisella tularensis c) Brucella melitensis d) Streptococcus pyogenes
If a lion eats a gazelle, before the molecules have been broken down by its cells, the lion has gained
A) potential energy. B) kinetic energy. C) entropy. D) respiratory capacity. E) enzymes for digesting grass.