Which of the following statements comparing hemidesmosomes with desmosomes is TRUE?
A. Hemidesmosomes are anchorage junctions but desmosomes are not.
B. Hemidesmosomes interact with actin filaments while desmosomes interact with intermediate filaments.
C. Hemidesmosomes anchor cells to the ECM while desmosomes anchor cells to other cells.
D. Hemidesmosomes are found in plant cells while desmosomes are found in animal cells.
E. Both hemidesmosomes and desmosomes associate with integrin, but not cadherin molecules.
C. Hemidesmosomes anchor cells to the ECM while desmosomes anchor cells to other cells.
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Which of the following statements describe a reason ribosomal genes are useful for comparing evolutionary relationships among organisms?
A. There are many differences in these genes, even among closely related species. B. All organisms possess these genes and they can be compared with each other. C. These are the only genes that have been sequenced for every organism on Earth. D. Ribosomes of prokaryotes and eukaryotes are identical. E. It is possible to compare the large subunit genes with the small subunit genes.
Which of the following is an advantage of using Bt to control insects?
A. Bt does not accumulate in the soil or in nontarget animals. B. Bt is easily degraded in the natural environment. C. It is a rather new agent, being only a few years old, so insects have not had time to develop resistance. D. Two of these are useful traits for the safe use of Bt to control insects.
Bile is made in the ____
a. gall bladder b. pancreas c. liver d. small intestine e. spleen
The area surrounding cells outside the plasma membrane is referred to as the ________ environment
Fill in the blank(s) with correct word