Answer the following statements true (T) or false (F)
1. Unmethylated CpG islands are correlated with inactive genes.
2. Loosely packed chromatin is said to be in an open conformation.
3. Alternative versions of proteins often have similar functions.
4. MicroRNAs increase the rate of mRNA translation.
1. FALSE
2. TRUE
3. TRUE
4. FALSE
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Which part of a bird's digestive system contains sand and rocks to aid in mechanical digestion?
a. crop b. esophagus c. gizzard d. pharynx e. proventriculus
Surface barriers, such as cutaneous and mucous membranes, serve the immune system as the __________.
What will be an ideal response?
Refer to Figure 29-1. The fungus illustrated in Figure A is:
a. multicellular.
b. coenocytic.
c. septate.
d. dikaryotic.
e. monokaryotic.
Which structure is considered part of both the digestive tract ad the respiratory tract?
a) gall bladder b) nasal cavities c) bronchiole d) esophagus e) pharynx