With ____, individual cells can be coaxed to divide and form embryos in a laboratory.

A. in vitro fertilization
B. sexual reproduction
C. tissue culture propagation
D. vegetative reproduction
E. grafting


Answer: C

Biology & Microbiology

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Which one of the following is not an adaptation shown by modern birds?  

A.  a respiratory system that allows all of the air to pass through the lungs in one direction B.  complete division of the heart into right and left halves C.  endothermy D.  wings and a long feathered tail E.  modified beaks and feet to support feeding behavior

Biology & Microbiology

Which of the following ocular tissues and infections is mismatched?

A. Keratitis; infection of deep eye tissue B. Conjunctivitis; milky discharge and infection of eyelid lining C. River blindness; microfilariae visible in the vitreous chamber D. Trachoma; infection of epithelial cells

Biology & Microbiology

In one butterfly species, the colors of individuals range from white to black, with many shades of gray in between

If the butterflies in a mountain population become more and more similar in color over several generations (e.g., if most butterflies are the same shade of gray), what kind of evolutionary force is likely acting on the population? A) Artificial selection B) Stabilizing selection C) Directional selection D) Disruptive selection

Biology & Microbiology

Which of the following is NOT primarily a sexually transmitted infection (STI)?

A) lymphogranuloma venereum B) genital herpes C) gonorrhea D) chancroid E) trichomoniasis

Biology & Microbiology