The cytoskeletal component that consists of different protein types is
A) a microtubule.
B) an intermediate filament.
C) a microfilament.
D) a fibrous filament.
B) an intermediate filament.
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The origins of which of the following cell types creates the least amount of ethical debate?
A. EG cells B. EC cells C. Hematopoietic stem cells D. ES cells
If a cross section of a eudicot herbaceous stem were compared with the cross section of its root the primary difference would be.
A. location of dermal tissue B. location of ground tissue C. location of vascular tissue D. location of terminal buds E. All of the choices are correct
In a person who does NOT have cystic
fibrosis, what is the related normal condition?
a. mucus slides easily over epithelial surfaces and can more easily be expelled b. osmotic balance in tissues is maintained by pumping sodium out of cells and chloride into cells c. pH balances are maintained by pH buffers, mainly the bicarbonate ion d. muscle fibers contract in coordination allowing smooth whole muscle contractions e. plasma membranes function properly to allow nonpolar molecules to diffuse into and out of the cells
In pines, an embryo is a(n) _____.
a) food reserve for the immature sporophyte b) immature female gametophyte c) immature sporophyte d) immature male gametophyte seed