Which of the following is true?
A) B cells are lymphocytes, but T cells are not
B) T cells are lymphocytes, but B cells are not.
C) Both B cells and T cells are lymphocytes.
D) Neither B cells nor T cells are lymphocytes.
C
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Life Boat Ethics, an article by Garret Hardin, compared the dilemma of aid from developed countries to developing countries to that of explorers and sailors establishing colonies around the world
Indicate whether the statement is true or false
Answer this question that relates to the sea level change graph below.
Look at the far left of the graph (about 13,000 years ago). How did salinity in the oceans 13,000 years ago compare to salinity in the oceans today?
A. Same salinity as today B. Less salty C. Saltier
The age of the earth is estimated to be ________ billion years.
A. 5.0 B. 5.5 C. 4.0 D. 4.5
How does the Moon generate tides? Why are there generally two high tides and two low tides a day? What will be an ideal response?