Refer to the accompanying figure. Assuming the pattern remains the same, what will the population experience in 50 years?
a. slow growth
b. rapid growth
c. steady state growth
d. negative growth
e. No prediction can be made using these data.
d
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People with aggamaglobulinemia do not make protective antibodies and suffer from recurrent, life threatening viral infections, but can develop normal immune responses to bacteria
Indicate whether the statement is true or false.
Why can a skin test be used to detect an infection associated with the lungs as in the case of TB?
A. Skin is a type of epithelial tissue, just like lung tissue. B. TB exposure can also occur on the skin. C. Memory T cells and B cells are present throughout the immune system. D. All of the answer options are correct.
Large antlers in male elk, which are used for battles between males, are a good example of a trait favored by
A) intersexual selection. B) intrasexual selection. C) disruptive selection. D) stabilizing selection.
The sexually transmitted diseases ________ and ________ can cause pelvic inflammatory disease, in which fallopian tubes become scarred and blocked.
A. chlamydia; syphilis B. gonorrhea; genital herpes C. gonorrhea; chlamydia D. syphilis; genital herpes