A substance that can elicit an immune response from a lymphocyte is called a(n) ________
A) defensive protein
B) pathogen
C) antibody
D) antigen
D
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A flower with carpels and stamens but no petals or sepals is
a. perfect and incomplete. b. imperfect and complete. c. imperfect and incomplete. d. perfect and complete. e. sterile
Answer the following statements true (T) or false (F)
1. The processes of transcription and translation occur almost simultaneously in prokaryotic organisms. 2. Gel electrophoresis allows biologists to study the exact base pair sequence of a genetic fragment. 3. Gene therapy in humans is a common procedure to treat and prevent genetic diseases. 4. Animals such as mice and fruit flies have enough similarities to humans to be used as model organisms, leading to key life-saving medical discoveries. 5. Darwin’s theory of evolution was heavily influenced by the genetic studies by Mendel, which had been published right before Darwin set sail for the Galapagos on the HMS Beagle.
ATP is produced by
A. the electron transport system. B. The Krebs cycle. C. glycolysis. D. All of the choices are correct.
All the cells that are not germ cells (egg and sperm cells or their precursors) are called ________ cells.
Fill in the blank(s) with the appropriate word(s).