Pharmaceutical companies prefer to genetically engineer large animals with human genes because it may be possible to obtain large amounts of the resulting protein from the animals'
A) milk.
B) fur.
C) blood.
D) meat.
E) bones.
A
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Human populations vary genetically, but the variation is subtle and not easy to find without large data sets. Most of the genetic variation in the human species exists between ________
Fill in the blank(s) with correct word
Which of the following is a structure adapted for seed dispersal by animals?
a. light, feathery plumes b. thick, indigestible seed coats c. air spaces and cork d. turgor pressure within fruits e. winged fruits
A(n) ____ character is a trait that has evolved relatively recently
a. derived b. ancestral c. cladistic d. homologous e. polyphyletic
The following are steps in using SSU rRNA molecules to develop phylogenetic trees. Place these steps in the correct order.1. Isolate DNA from cells of each organism being tested.2. Amplify the DNA of the SSU rRNA genes of each organism using polymerase chain reaction. 3. Determine the nucleotide sequence of the SSU rRNA genes of each organism.4. Align nucleotide sequences to compare.5. Count the number of nucleotide differences between each pair of sequences and calculate the evolutionary distance.6. Input data into computer and use appropriate software to construct a phylogenetic tree.
Fill in the blank(s) with the appropriate word(s).