The components of membranes that account for
most of their active functions are
a. carbohydrates.
b. sterols.
c. proteins.
d. fats.
e. phospholipids.
Answer: c
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Who developed the modern endosymbiotic theory?
a. Charles Darwin b. Lynn Margulis c. Richard Dickerson d. Wendy Johnson e. Stanley Miller
An illustration constructed by a biologist to represent the evolutionary relationships between species and shared ancestors is called a(n)
A. systematic tree. B. ancestral tree. C. phylogenetic tree. D. taxonomic tree. E. tree of life.
The coastal forests of Eastern Africa is home
to many endemic species and many of those species are either threatened or endangered. Because of this the coastal forests of Eastern Africa have been designated by Conservation International as a conservation __.
a. hot spot b. endangered region c. national park d. island e. ecoregion
Name that STD! Choose from the following STDs. You may use each choice more than once. In some cases, there may be several correct answers
gonorrhea, chlamydia, human papillomavirus (HPV) infection, genital herpes, syphilis • Which STD usually causes death if it is left untreated? • This STD goes through three stages before causing death. • Which STD is suspected after an abnormal PAP test in females? • Name two STDs that can be contracted on mucus membranes other than those of the reproductive systems. • If an STD is detected early, many can be easily treated. Which STD cannot be treated (meaning that the person can never get rid of it, even though it may be managed)? • Name three STDs that may have no symptoms (in either men or women). • John has symptoms of an STD (burning sensation while urinating and a yellowish discharge from the urethra) that popped up 3 days after sexual contact with a questionable partner. Based on his symptoms and this timing, John probably has which STD? • This STD can cause genital warts. • Which STD can cause a rash over the entire body? • Several STDs can be transmitted by oral sex. Name one. • For which STD is there now a vaccine available for females? What will be an ideal response?