Which functional group is polar and a key component of alcohols?
a. carbonyl group
b. hydroxyl group
c. phosphate group
d. amino group
e. carboxyl group
B
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Which layer of the extracellular matrix of a plant provides the greatest strength?
A. the middle lamella B. the primary cell wall C. the secondary cell wall D. the plasma membrane
From what substance do liposomes spontaneously form and why are they important?
a. Liposomes spontaneously form from DNA and proteins and provide a rigid structure to support the cell. b. They are formed from phospholipid monolayers. These phospholipid monolayers provide a stable barrier between the internal and external environments. c. Liposomes were the first rigid cell walls providing support for the living cell and a barrier between the external and internal environments. d. Liposomes form from phospholipid bilayers and provide a barrier between an external environment and an internal environment; this creates an internal environment where specific chemical reactions needed to establish a living cell can occur separately from the external environment.
Which of the following are used by cyanobacteria for reproduction?
A. Fragmentation B. Binary fission C. Budding D. All of the choices are correct.
All groups of living organisms share several key characteristics or functions
What will be an ideal response?