The classifications gram-positive and gram-negative are based on ________ of the bacterial cell wall
Fill in the blank(s) with correct word
staining
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The differential success of alleles is called _____
A. selection. B. genetic drift. C. fixation. D. migration. E. evolution.
Answer the following statements true (T) or false (F)
1. Genes that are expressed only when needed are called constitutive genes. 2. Polysaccharides, polypeptides, and nucleic acids are all examples of polymers. 3. During translation, amino acids are “activated” by attaching to an appropriate rRNA molecule. 4. The peptide bonds that hold amino acids together in protein molecules are examples of covalent bonds. 5. In double-stranded DNA molecules, the two strands are held together by hydrogen bonds.
Match the following items with the correct phrases.
_______1. The causative agents of dengue fever, filariasis, malaria, West Nile encephalitis, and yellow fever are all transmitted by ____________________. _______2. ____________________ transmit the causative agents of babesiosis, ehrlichiosis, Lyme disease, relapsing fever, and Rocky Mountain spotted fever. _______3. The causative agent of American trypanosomiasis (Chagas's disease) is transmitted by arthropods in a class of insects known as ____________________. _______4. ____________________ transmit the causative agents of epidemic typhus and trench fever. _______5. African sleeping sickness, leishmaniasis, and onchocerciasis are transmitted by various types of ____________________. a. biting flies b. bugs c. lice d. mosquitoes e. ticks
The smallest unit that can evolve is a(n) __________.
a. population b. species c. genotype d. individual e. family