Evolution is sometimes described as the change from preexisting life-forms to modern-day organisms. What actually changes, in every case of evolution, is the
A) ability of organisms to respond to external stimuli.
B) energy and nutritional demands of the organism.
C) species' physical appearance.
D) rate of reproduction.
E) genetic makeup of the species, due to mutations.
E
You might also like to view...
An example of a nonpolar signaling molecule is ____
a. epinephrine b. insulin c. testosterone d. growth factors e. neurotransmitters
Although some sharks close their eyes just before they bite, their bites are on target. Researchers have noted that sharks often misdirect their bites at metal objects and that they can find batteries buried under sand
This evidence suggests that sharks keep track of their prey during the split second before they bite in the same way that a _____. A) rattlesnake finds a mouse in its burrow B) male silkworm moth locates a mate C) bat finds moths in the dark D) platypus locates its prey in a muddy river
Anabolic reactions are those that ________ .
a. break down proteins into amino acids b. release energy c. increase absorption of nutrients in the small intestine d. regulates the passage of molecules in and out of a cell e. convert small molecules to larger ones
In a polar covalent bond,
A) an acid and a base neutralize each other to form a salt. B) electrons are shared equally between two atoms. C) electrons are transferred from one atom to another. D) electrons are shared unequally between two atoms. E) electrons are shared unequally between more than two atoms.