Triploblastic refers to animals that
A. form three blastopores in each blastula.
B. form three separate blastulas from a single embryo.
C. produce three eggs, each of which forms a single blastula.
D. have a blastula composed of three cells.
E. have three germ layers.
Answer: E
You might also like to view...
The supersecondary structure (motif) most likely to contain a heptad (or leucine) repeat would be:
A. a Greek key. B. a ?-?-?. C. a helix-turn-helix. D. a coiled-coil. E. a four-helix bundle.
The brush border lining of the small intestine is derived from ____
a. rugae b. villi c. microvilli d. autonomic nerves e. circular smooth muscle
An ovule usually develops directly into a fruit
____________________ Indicate whether the statement is true or false.
You uncovered a fossil that you suspect is around 100 million years old. Which of the radioisotope pairs in the table below could you eliminate as an appropriate choice for radioisotope dating the accompanying rock? 
A. Uranium-235/Lead-207 (half-life = 710 million years; useful dating range = 10 million-4.5 billion years) B. Uranium-238/Lead-206 (half-life 4.5 billion years; useful dating range = 10 million-4.5 billion years) C. Potassium-40/Argon-40 (half-life = 1.3 billion years; useful dating range =100,000-4.5 billion years) D. Carbon-14/Nitrogen-14 (half-life = 5,730 years; useful dating range = 100-50,000 years) E. Rubidium-87/Strontium-87 (half-life = 47 billion years; useful dating range = 10 million-4.5 billion years)