Growth factors are examples of which type of chemical signal?
A. paracrine signals
B. autocrine signals
C. hormones
D. pheromones
E. neurotransmitters
A
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Which two sexually transmitted diseases (STDs) commonly occur together?
a. HPV infection and chlamydia b. chlamydia and gonorrhea c. gonorrhea and syphilis d. trichomoniasis and genital herpes e. trichomoniasis and syphilis
Which of the following disorders results from an adult getting an insufficient amount of vitamin D, which results in demineralized, brittle bones?
What will be an ideal response?
Which of the following stores the most energy in chemical bonds?
A. glucose B. sucrose C. galactose D. glycogen E. ribose
The duck-billed platypus and other monotremes differ from other mammals in that they
A) are aquatic. B) lay eggs. C) have mammary glands. D) have hair.