The eleven pairs of appendages projecting from the rostral area of star-nosed moles are _____
A) chemosensory structures
B) tactile structures
C) olfactory structures
D) gustatory structures
B
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Answer the following statements true (T) or false (F)
1. More conservation spending has led to greater recovery of black rhinoceros numbers. 2. The United States contains at least one biodiversity hot spot. 3. The passenger pigeon went extinct due to an introduced parasite. 4. The number of extinctions of birds and mammals has gone up as human populations have increased. 5. The introduction of avian malaria to Hawaii was responsible for the extinction of almost half of Hawaii's native birds.
Transgenic animals are referred to as ________ modified organisms.
A. chemically B. genetically C. naturally D. physically
The chemical difference between dideoxyribonucleotides used in Sanger sequencing and the deoxyribonucleotides
normally found in DNA is the presence of a(n) _____ in the deoxyribose sugar of dideoxyribonucleotides.
a. 3' – H rather than – OH b. 5' – H rather than – OH c. 5' – OH rather than – H d. 5' – H rather than – OH e. 3' – COOH rather than – OH
In a typical atom, the positive charge of each proton is ________
a. expressed by the value of the atomic mass b. countered by the negative charge of each neutron c. neutralized only when the atom bonds to others to form a molecule d. balanced by the negative charge of an equal number of electrons