Because peptidoglycan lies outside the plasma membrane, all steps in the complex synthesis process of this molecule takes place outside the cell.
Answer the following statement true (T) or false (F)
False
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Why do peahens choose peacocks with the longest, showiest tails, when a long tail might be easily grabbed by a
predator?
What will be an ideal response?A male sea lion is very large in comparison to its female counterparts and has a large sagittal crest on its head. What is this an example of?
a. Sexual dimorphism b. Type specimen c. Sexual variety d. Isolating mechanism
Which of the following is not a membrane-bound organelle?
A) mitochondrion B) cytoskeleton C) nucleus D) endoplasmic reticulum
Based on the graph in Figure 45-1, which of the following statements is true?
a. The primary response to the initial injection subsided after seven weeks.
b. The primary response to the initial injection peaked at 102 antibody units.
c. The primary response to the initial injection was faster, but not as intense as the secondary
response.
d. The secondary response to the initial antigen was both faster and more intense than the
primary response.
e. The primary and secondary responses to the initial antigen were about equal.