What is the most common "reward" for butterflies from flowers they pollinate?

A. fruit
B. seeds
C. honey
D. pollen
E. nectar


Answer: E

Biology & Microbiology

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As the result of exposure to a mutagen, cytosine is substituted for thymine in one strand of DNA. Upon subsequent DNA replication, one of the daughter cells will have a GC pair in this position instead of an AT pair. This is called a(n) ________ mutation.

A. insertion B. transition C. frameshift D. transversion

Biology & Microbiology

Sex influenced traits are influenced by the presence of ____

a. cortisol b. estrogen c. testosterone d. thyroid hormone e. both estrogen and testosterone

Biology & Microbiology

Anabolic steroids:a

are removed from the body fairly quickly due to a low concentration of receptor sites. b. decrease HDL concentration, thereby increasing the risk of cardiovascular disease. c. are naturally produced hormones typically used by athletes for short-term performance enhancement. d. have little or no effect on physiology or behavior at very low doses. e. are metabolized and excreted from the body quickly..

Biology & Microbiology

Which is true about Stage 2 sleep?

-it generally makes up 50% of an adult's sleep time -it is characterized by Theta waves, sleep spindles, and K complexes -breathing becomes regular -muscles become more relaxed

Biology & Microbiology