Which of the following statement best describes the defining characteristics of members of the Class Testudines?
A. They lack teeth.
B. They have a hard shell.
C. They have a kinetic skull.
D. They have both a hard shell and are lacking in teeth.
E. They have both a kinetic skull and a hard shell.
D. They have both a hard shell and are lacking in teeth.
You might also like to view...
Although poliovirus capsids contain several distinct proteins, these are synthesized as a single polypeptide then cleaved by proteases to produce the individual proteins.
Answer the following statement true (T) or false (F)
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. Potassium-40/Argon-40 (half-life = 1.3 billion years; useful dating range =100,000-4.5 billion years).
B. Rubidium-87/Strontium-87 (half-life = 47 billion years; useful dating range = 10 million-4.5 billion years).
C. Uranium-235/Lead-207 (half-life = 710 million years; useful dating range = 10 million-4.5 billion years).
D. Carbon-14/Nitrogen-14 (half-life = 5,730 years; useful dating range = 100-50,000 years).
E. Uranium-238/Lead-206 (half-life 4.5 billion years; useful dating range = 10 million-4.5 billion years).
Insulin lowers glucose concentration in the blood, by binding to receptors on liver cells, adipose tissue, and skeletal muscle cells. What type of receptor does insulin bind to?
1.adrenergic receptor 2.G-protein–coupled receptor 3.internal receptor 4.receptor tyrosine kinase
Endosteum
What will be an ideal response?