Orgasm is necessary for
a. ejaculation of semen.
b. pregnancy.
c. erection.
d. sexual arousal.
e. all of these.
Answer: a
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Which of the following correctly matches a cell or group of cells with its ability to differentiate into different specialized cells? (Select all correct choices.)
A. fertilized egg: pluripotent B. mesoderm: pluripotent C. endoderm: multipotent D. fertilized egg: multipotent E. ectoderm: totipotent
Paedomorphosis is
A. the formation of limbs from fins in the evolution of land vertebrates. B. the change from radial to bilateral symmetry in the evolution of plants and animals. C. the retention of juvenile traits in an adult organism. D. an earlier development of adult traits in an organism. E. the development of different types of eyes from a simpler form.
In a ________ circulatory system, circulation of blood is more controlled-the blood is moved faster and more efficiently than in other types of circulatory systems.
Fill in the blank(s) with the appropriate word(s).
Nocardia cause biodeterioration of rubber joints in water and sewer pipes.
Answer the following statement true (T) or false (F)