Are antheridia present in conifers?
What will be an ideal response?
No Are archegonia present? Yes
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Steroid and peptide hormones typically have in common _____
A) the building blocks from which they are synthesized B) their solubility in cell membranes C) their requirement for travel through the bloodstream D) the location of their receptors E) their reliance on signal transduction in the cell
How is a carrier protein different from a channel protein?
A. Carriers use ATP. B. Carriers undergo a conformation change. C. Transport through a carrier depends on concentration gradients. D. Transport through a carrier does not depend on the random motion of molecules.
Rocky Mountain spotted fever is an example of a(n)
A. animalosis. B. tickonosis. C. plantonosis. D. zoonosis.
Transporters that require an energy boost help sodium ions across a cell membrane. This is a case of _____
a. passive transport c. facilitated diffusion b. active transport d. passive transport and facilitated diffusion