Search results
Results from the WOW.Com Content Network
Educator. 12 years ago. Both require membrane transport proteins. However, facilitated diffusion does not require energy and moves substances down a concentration gradient. Active transport requires energy and moves substances against a concentration gradient. Report.
Definition for. Terminal cisternae. Terminal cisternae are enlarged areas of the sarcoplasmic reticulum surrounding the transverse tubules. These discrete regions within the muscle cell store calcium (increasing the capacity of the sarcoplasmic reticulum to release calcium) and release it when an action potential courses down the transverse ...
Definition for. Vessel. 1) In a plant, a pipeline-like file of dead, water-conducting vessel elements. 2) In finance, vessel refers to a conveyance for the transport of goods by water. Biology Forums - Study Force is a free online homework help service catered towards college and high school students. Get homework help and answers to your ...
Definition for. Tautomeric shift. Tautology. Tax-haven country. A tautomeric shift produces a transition mutation in the complementary strand. Induction of transition mutations by spontaneous tautomeric shifts. In the original double-stranded DNA molecule, A in the standard (amino) form pairs with T. During replication, the two strands separate.
Definition for. Cyclin-dependent kinase (cdk) A protein responsible for advancing a cell through the phases of the cell cycle. Its function is dependent on the binding of a cyclin. Biology Forums - Study Force is a free online homework help service catered towards college and high school students.
The flowchart below illustrates the steps involved in root nodule formation. The first step has been filled in to get you started. Complete the rest of the chart. First, drag the white labels below the images, indicating what happens at each step. Then, drag the blue labels to the blue targets, indicating the plant gene functions that must be ...
Definition for. Hybrid breakdown. A postzygotic mechanism of reproductive isolation in which an interspecies hybrid is viable and fertile, but subsequent generations harbour detrimental genetic abnormalities. Biology Forums - Study Force is a free online homework help service catered towards college and high school students. Get homework help ...
Convection. 1) The transfer of heat by the movement of air or water next to the body. 2) Convection is the process by which heat is transferred from one part of a fluid to another by movement of the fluid itself. There are two methods in which this can be carried out. One is by natural convection, in which movement occurs as a result of gravity ...
Definition for. Hybrid inviability. From Biology Forums Dictionary. Hybrid breakdown. Hybrid sterility. A postzygotic mechanism of reproductive isolation in which an egg of one species is fertilized by a sperm from another species, but the fertilized egg cannot develop past the early embryonic stages.
Biology Forums - Study Force is a free online homework help service catered towards college and high school students. Get homework help and answers to your toughest questions in biology, chemistry, physics, mathematics, engineering, accounting, business, humanities, and more.