Which of the following organisms is composed of many integrated cells, each capable of living and reproducing on its own?
A. Brown algae
B. Colonial organism
C. Multicellular organism
D. Endosymbiotic organism
E. Euglena
Answer: B
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Which class of proteins are embedded in the phospholipid bilayer?
a. cytoskeletal proteins b. integral proteins c. transcription factor proteins d. peripheral proteins e. protein hormones
Which of the following choices best describes gated transporters? a. Gated transporters are channels or pores in the membrane that are always open
b. Gated transporters expend energy to move molecules against concentration gradients. c. Gated transporters change shape in response to binding or charge, releasing the molecule on the other side. d. Gated transporters move two substances across the membrane in opposite directions.
Infants born blind will not smile or frown because they have never seen anyone exhibit these expressions.
Answer the following statement true (T) or false (F)
Iskander wants to live as long as his great-grandfather, who died at 104, strong and healthy almost to the last. What are some things that could make a difference for his pathway to good health and long life?
What will be an ideal response?