What advantages do placental mammals have
over montremes and marsupials?
a. higher metabolic rate
b. better temperature homeostasis
c. more efficient method of nourishing
embryos
d. offspring are more developed at birth
e. all of these are placental mammal
advantages
E
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a. C3 b. C4 c. CAM d. C3 and CAM e. C4 and CAM
Which of the following organelles possess DNA separate from nuclear DNA that can be used to trace genealogies of humans?
a. ribosomes b. chloroplasts c. mitochondria d. lysosomes
Adding acetyl and methyl groups to a histone regulates gene expression by _________________.
A. increasing the pH of the cell B. loosening the DNA wound around the histone C. modifying the nucleotides of the promoter region of the DNA molecule D. tightening the DNA wound around the histone E. enhancing the development of a DNA-RNA hybrid
Please refer to the figure of the genetic code. Which of the following mutations in a co-don are likely to be selectively neutral?
a. UUG ->CUG b. AUA ->AUG c. AAC -> AAA d. UGC -> UGA e. AGC -> AGA