Darwin faced which of the major challenges to his theory?

a. accounting for complex structure with multiple intricate parts
b. explaining traits and organs of seemingly little importance
c. geographic features playing an important role in the clustering of similar, closely related spe-cies
d. All of the above


D

Biology & Microbiology

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RNA molecules that also act as enzymes are given the name

A. ribozymes B. cofactors C. coenzymes D. allosteric enzymes

Biology & Microbiology

Which of these structures does not begin development during embryogenesis?  

A.  apical meristem B.  vascular tissue C.  floral primordia D.  leaf primordial E.  ground tissue

Biology & Microbiology

Which of the following are capable of converting light energy to chemical energy?

a. chloroplasts b. mitochondria c. leucoplasts d. peroxisomes e. Golgi bodies

Biology & Microbiology

Which category contains organisms that have mitochondria?

a. Bacteria b. Archaea c. Eukarya d. Mercaria

Biology & Microbiology