The lateral movement of transmembrane proteins can be restricted by several different mechanisms. Which mechanism best describes the process by which focal adhesions are formed to promote cell motility?
(a) proteins are tethered to the cell cortex
(b) proteins are tethered to the extracellular matrix
(c) proteins are tethered to the proteins on the surface of another cell
(d) protein movement is limited by the presence of a diffusion barrier
(b)
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Which of the following organelles is not surrounded by a membrane?
a. chloroplast b. nucleus c. mitochondrion d. lysosomes e. ribosomes
You find a notebook that has lots of equations, tables, and graphs in it. The tables have columns for the number of female offspring born over a year, the number of deaths over a year, and the number of individuals in various age classes. What subject do you think the owner of the notebook is studying? What type of tables are they most likely using?
A. demography; life tables B. iteroparity; life tables C. iteroparity; survivorship tables D. growth ecology; transition tables E. demography; survivorship tables
In the 1950s, the ____________ hypothalamus was thought to be a satiety centre.
Fill in the blank(s) with the appropriate word(s).
Select the best response to the question
?Nasal specimens are indicated when testing for all of the following conditions except: A) sinus infections. B) rhinoviruses. C) influenza. D) respiratory syncytial virus.