Which of the following illustrates evolutionary relationships among organisms?

a. Phylogenetic tree
b. Taxonomic diagram
c. Classification system
d. Binomial nomenclature


a. Phylogenetic tree

Phylogenetic tree illustrates evolutionary relationships among organisms.

Biology & Microbiology

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Which of the following pollutants is associated with thyroid cancer?

a. nitrate b. nitrous oxide c. ammonia d. phosphate e. more than one of these

Biology & Microbiology

People with the chromosome constitution ____________________ were once considered more

genetically predisposed to committing violent crime than those with a normal chromosome constitution. Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

Cystic fibrosis is caused by the allele f, which is completely recessive to the normal dominant allele F. Consider a couple who both have the genotype Ff. What is the chance that their first child will develop cystic fibrosis?

A) 0% B) 25% C) 50% D) 75%

Biology & Microbiology

The "thumb" of the panda is really a modified ________ bone, which evolved because it improved ______________.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology