1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ahat [919]
3 years ago
5

.

Biology
2 answers:
Black_prince [1.1K]3 years ago
7 0

Answer:

genes and the environment

Explanation:

The traits that an organism have are affected by genes as well as environment.

Some of the phenotypic variances in individuals of a population are because of genotypic difference amongst them which is known as genetic variance and represented by (Vg).

Some of the differences in phenotypes are because of environment so it is known as environmental variance and represented by Ve.

But, if the effect of a gene depends upon a specific environment in which it is found then it is termed as genetic environmental interaction variance and represented by Vge.

So, the total phenotypic variance of traits is represented by the formula mentioned below:

Vp = Vg + Ve + Vge

Hence, genes and environment have cumulative effect on traits.

Artist 52 [7]3 years ago
6 0
Genes and the environment
You might be interested in
How do temperature and concentration of monounsaturated phospholipids change the rate at which molecules permeate the plasma mem
Nikitich [7]

Answer: At low temperatures the fluidity of the membrane decreases and it favors fluidity. The higher the concentration of unsaturated fatty acids, the less tightly the phospholipids can bind and the more fluid (more permeable).

Explanation:

The plasma membrane is a lipid layer that delimits the entire cell, dividing the extracellular medium from the intracellular (the cytoplasm of a cell). They are composed of phospholipids, which are molecules composed of glycerol, a phosphate group and two lipid chains (such as fatty acids). Glycerol is a three-carbon molecule that functions as the backbone of this membrane. A geometry is formed that allows the phospholipids to line up side by side to form broad sheets. They are insoluble in water, but their unique geometry causes them to aggregate in layers without any energy input, as they possess a hydrophilic phosphate head and a hydrophobic tail consisting of the two fatty acid chains. The hydrophilic heads of the phospholipids in a bilayer membrane face outward and are in contact with the aqueous fluid inside and outside the cell. Because water is a polar molecule, it readily forms electrostatic (charge-based) interactions with the phospholipid heads.

Selective permeability is a property of the plasma membrane and other semipermeable membranes that allow only certain particles to pass through them. In this way,<u> those particles that are needed by the cell can enter the cell and those that are not useful to the cell are prevented from entering</u>. In the same way, the cell can eliminate the particles it has produced as waste. In this way, the entry and exit of substances through the membrane is regulated and the correct functioning of the cell is achieved.

For a particle to be able to cross the plasma membrane it must have a size equal to or smaller than the pores of the membrane, it must have the opposite charge to the charge of the membrane or simply have a neutral charge, and if it is larger than the pores it must be dissolved in a solution, decreasing its size and thus be able to enter the cell through the membrane.  

Plasma membranes are fluid and this fluidity depends on their lipid composition and temperature. Depending on the temperature, membrane lipids can be found in two different states or phases: gel (solid-like, with more rigid hydrocarbon chains) and liquid crystal (more fluid, with more mobile hydrocarbon chains). At low temperatures the fluidity of the membrane decreases and in these conditions the increase of its concentration favors fluidity. The temperature at which the transition from one state to the other occurs is the phase transition temperature (Tc). At values below Tc, the bilayer is in the gel state and at higher values it passes to the liquid crystal. It should be noted that there is an equilibrium between the gel state and the liquid crystal state and that the characteristics of the lipids of the bilayer condition the transition temperature. In the case of bilayers consisting of only one type of lipid, the Tc is well defined. But biological membranes are complex lipid mixtures and the transition from one state to another occurs over a range of temperatures. The presence of short-chain or unsaturated fatty acids reduces the transition temperature, while saturated fatty acids and the increase in the length of the hydrocarbon chains cause this temperature to rise. <u>Then, phospholipids with unsaturated fatty acid tails cannot bind as tightly due to the bent structure of their tails. For this reason, a membrane of unsaturated phospholipids remains fluid at lower temperatures than a membrane of saturated phospholipids</u>.  

The fluidity of a membrane is the ability of a molecule to move through it.<u> In short, the higher the concentration of unsaturated fatty acids, the less tightly the phospholipids can bind and the more fluid (more permeable) the membrane will be even at low temperatures</u>. However, <u>at low temperatures the fluidity of the membrane decreases (lower permeability) but the effect will depend on the composition of the fatty acids</u>. To determine the exact permeability, it is necessary to relate the concentration of unsaturated bonds and the length of the fatty acids in the phospholipids and the temperature.

8 0
3 years ago
Gives strength to cell: would this be plasma membrane or cell wall
Virty [35]
The cell wall gives strength to a cell. 
5 0
3 years ago
What part of the brain analyzes why you are feeling pain before your reflexes react?
kow [346]
The brain analyzes thattt
8 0
3 years ago
Food webs!!! Please help!
Galina-37 [17]

Answer:

A.

Explanation:

Hope this helps

5 0
3 years ago
Read 2 more answers
A student drew atomic models of four elements.
VARVARA [1.3K]

Answer:Neon

Explanation:

Less amount of energy levels

5 0
3 years ago
Read 2 more answers
Other questions:
  • A company develops a new pesticide that kills insects. When the pesticide is first used, it kills nearly all the insects.
    6·1 answer
  • If my cousin proposed to his girlfriend, and she is now his finance, when they get married, What is her relation to me?
    10·2 answers
  • Which sphere in the Earth system is also part of the hydrosphere? O A. Atmosphere O B. Biosphere O C. Geosphere D. Cryosphere​
    8·2 answers
  • Please don't copy and paste from Google, my teachers check for plagiarism and I've been caught before.
    14·1 answer
  • The bacterium _____ is commonly found in deli meats, hot dogs, soft cheeses, raw meat, and unpasteurized milk.
    11·2 answers
  • What form of RNA carries instructions from the nucleus to the ribosome?
    11·1 answer
  • Las bacterias tienen vida propia?
    15·1 answer
  • What is a herbivore
    7·1 answer
  • List three limitations for measuring cell size​
    7·1 answer
  • the northern leopard frog, tree frog, and wood frog are all different species of frogs. why is having a scientific name for each
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!