How much of the radiant energy from the sun is incorporated into organic compounds in the process of photosynthesis?
A. 50%
B. 1% or less
C. 25%
D. almost 90%
Answer: B
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Answer the following statements true (T) or false (F)
1. Hagfish are craniates but are not vertebrates. 2. A hagfish is a not a fish. 3. Lampreys' main body support is the notochord, not a vertebral column. 4. Sharks have cartilaginous skeletons because bone-forming ability had not yet evolved in vertebrates when they originated. 5. The swim bladder is an organ in primitive fish from which the lungs of terrestrial vertebrates developed.
Genes that are always "turned on" in a cell are referred to as
A) regulated genes. B) mutations. C) inducible. D) constitutive. E) catabolic.
Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
What will be an ideal response?
Answer the question using the accompanying figure. The region that determines the class of antibody is indicated by
number ____.
a. 1 b. 2 c. 3 d. 4 e. 5