Protein filaments that function in muscular contraction are
A. keratin and actin.
B. myosin and collagen.
C. elastin and collagen.
D. actin and myosin.
E. elastin and keratin.
D. actin and myosin.
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Indirect immunofluorescence involves fixing the specimen onto a slide, adding fluorochrome-labeled antibodies and then incubating before examining on the microscope.
Answer the following statement true (T) or false (F)
Linnaeus classified organisms based on
1.DNA sequences. 2.protein sequences. 3.morphological characteristics. 4.evolutionary history. 5.existing phylogenetic trees.
Madagascar is considered a biodiversity "hotspot" because
A. it contains an unusually high concentration of species. B. it has resisted habitat destruction that has caused extinctions elsewhere. C. it originated as a volcanic island. D. it has lost nearly all of its native species to extinction. E. All of the choices are correct.
The label on the box of breakfast cereal lists one serving as containing "200 Calories" per serving. How many calories are actually in one serving?
A) 20 B) 2,000 C) 200,000 D) 2,000,000