The major cause of death in developing countries is infectious diseases, such as malaria. In developed countries the major causes are
a. infectious diseases, such as cholera.
b. non-infectious diseases, such as cancer.
c. injuries.
d. both a and c.
Answer: B
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Which of the following cells are haploid?
A. oogonium B. spermatogonium C. primary oocyte D. ovum E. oogonium and spermatogonium
Which line, A, B, C, D, points to a cell that will participate in the secondary immune response?
1.A
2.B
3.C
4.D
Most eukaryotic genes are cloned directly into the vector for expression in prokaryotes
Indicate whether this statement is true or false.
The fluid-mosaic model considers the cellular membranes to consist of ________ layer(s) of phospholipid molecules and that the individual phospholipids are able to move about within the structure of the membrane.
A. 1 B. 2 C. 3 D. 4