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jekas [21]
3 years ago
12

Which of the following elements are major

Biology
1 answer:
Grace [21]3 years ago
3 0
Carbon and phosphorous
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There can be different variations of a trait known as __________
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the offspring of crosses between parents with different traits?. Such as, the process by which peas are allowed to self-pollinate and produce offspring identical to themselves. A specific characteristic that varies from one individual organism to another. The offspring of crosses between parents with different traits. The chemical factors that are passed from one generation to the next.

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Name two strategies of human body defence system​
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You have external defense systems, which include your skin, tears, mucus, saliva, stomach acid, cilia (small hairs) and helpful bacteria. The skin, nails and hair form the integumentary system, which stops dirt and pathogens from entering the body.

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What factors should be considered when determining the amount of food servings you need each day?
mars1129 [50]
I think it is D. all of the above. 
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3 years ago
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Which is a mechanism for restricting the movement of proteins in the plasma membrane? Choose one or more:
alexgriva [62]

Answer:

The correct answers are option A. "tethering proteins to the cell cortex", B. "using barriers such as tight junctions", C. "tethering proteins to the extracellular matrix", D. "forming a covalent linkage with membrane lipids", E. "tethering proteins to the surface of another cell"

Explanation:

According to the fluid-mosaic model, the components of cell membranes are in constant movement forming a barrier to avoid unwanted exterior component internalization and to avoid the loss of precious internal components. This constant movement could cause that proteins move across the plasma membrane. But, this is avoided by several mechanisms including:

A. Tethering proteins to the cell cortex. The cell cortex is a rigid structure made of actin and actomyosin. Proteins found in the plasma membrane are tethered to this structure to restrict their movement.

B. Using barriers such as tight junctions. Tight junctions are barriers found in epithelia made of claudin and occludin proteins. These barriers are impenetrable, which avoid the movement of proteins in the cell membrane.

C. Tethering proteins to the extracellular matrix. The extracellular matrix is made of several proteins and macromolecules that provide a structural and biochemical support to cells that are nearby. Proteins could be tethered to this rigid structure as well.

D. Forming a covalent linkage with membrane lipids. The proteins in the cell membrane that form a covalent linkage with membrane lipids are known as lipid-anchored proteins, or lipid-linked proteins.

E. Tethering proteins to the surface of another cell. When cell-cell communication take place it is possible that proteins in the cell membrane got tethered to the surface of the other cell.

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3 years ago
The movement of tectonic plates in two different locations is shown below:
Ostrovityanka [42]

Answer:

Subduction may occur in both locations.

Explanation:

4 0
3 years ago
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