The major weakness of Charles Darwin's theory during his lifetime was the:
A) fact that, at certain points in embryonic development, diverse species all have structures known as pharyngeal gill slits.
B) fact that populations do not promote competition but rather promote sharing.
C) lack of a mechanism to explain how traits were passed to offspring intact when most believed inheritance worked through blending.
D) lack of variation in natural populations.
Answer: C
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A. influenza. B. herpes. C. polio. D. rabies.
When a gamete that is lacking a sex chromosome due to nondisjunction has fused with a gamete carrying an X chromosome, this type of abnormality leads to ________.
A. Triple X syndrome B. Down Syndrome C. Edward Syndrome D. Turner syndrome E. Klinefelter Syndrome
The science of ____ explains the origin of life, the persistence of life, and studies the changes in living
things.
a. nanotechnology b. mathematics c. biology d. chemistry e. pharmacology
You are doing research on a bacterial species, trying to determine the nature and structure of a number of intracellular inclusions. Which type of microscopy would provide the best view of these intracellular structures?
A. transmission electron microscopy B. dark-Field microscopy C. bright-field microscopy D. scanning electron microscopy