i believe it is a but please tell me if im wrong
b. manipulated by changes to the independent variable.
c. a variable that is kept constant.
d. a variable that is used as a control
a dependent variable depends on the independent variable
C. Photosynthesis
The structure of a biological membrane consists of a bilayer of phospholipids, housing proteins and cholesterol, with an outward-facing surface adorned with carbohydrate-protein and lipid complexes. The composition allows a fluid movement of proteins within the plane of the membrane, and a selective permeability due to its hydrophobic interior.
The structure of a biological membrane, often referred to as the fluid mosaic model, consists of two layers of phospholipids forming a bilayer. These phospholipids have hydrophilic heads that face outward, one layer exposed to the inside of the cell and the other exposed to the outside. Between these layers, the hydrophobic tails meet, creating a hydrophobic interior.
The proteins are embedded within this phospholipid bilayer and can move freely within the plane of the membrane. Cholesterol is also present in the biological membrane contributing to its fluidity. Some of these proteins also serve to transport materials into or out of the cell.
Also associated with the phospholipid bilayer are carbohydrates attached to some of the proteins and lipids on the membrane's outward-facing surface. These form complexes that function to identify the cell to other cells.
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Answer:
Thorn.scrub is intermediate between the desert and tropical forest bio.mes. The vegetation consists largely of short trees, ten to twenty feet (3-6 m) tall, and shrubs, with cacti also being common in the "New World" communities. It is generally more dense and taller than desert vegetation, and many species are tho.rny.
Alli <3
resource
habitat
evolution
Answer:
plasma state
Explanation:
Matter in the plasma state has variable volume and shape, but as well as neutral atoms, it contains a significant number of ions and electrons, both of which can move around freely. Plasma is the most common form of visible matter in the universe.