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Salsk061 [2.6K]
2 years ago
15

Reasons why a virus is living and nonlivng???

Biology
1 answer:
Virty [35]2 years ago
7 0
Because it starts out as one cell
You might be interested in
Help asap please!
andreyandreev [35.5K]

Answer:

Active transport:

  • requires energy
  • molecules move from low to high concentration sides
  • Na+ and K+ move by active transport

Simple diffusion:

  • molecules move from high to low concentration sides
  • molecules pass between lipids
  • small non-polar and polar molecules

Facilitated diffusion:

  • molecules move from high to low concentration sides
  • involves channel proteins
  • move large molecules

Explanation:  

  • Simple Diffusion is the pathway of only small molecules that freely move through the membrane by momentary openings produced by the lipids' movements. Diffusion is a slow process that requires short distances and pronounced concentration gradients to be efficient. An example of diffusion is osmosis by which water is the transported molecule.
  • Facilitated diffusion is the transport of hydrophilic molecules that can not freely cross the membrane. Channel protein and many carrier proteins are in charge of this transport. When uncharged molecules cross the membrane, they do it according to their concentration gradients, going from the more concentrated side to the lower concentrated one. When ions need to cross the membrane, the process depends on an electrochemical gradient.  Glucose is an example of a hydrophilic protein that gets into the cell by facilitated diffusion.

Simple diffusion and facilitated diffusion are both passive transport processes because they only depend on electrochemical gradients, so they do not need any energy to occur.

  • Active transport is the transport of molecules that move against the electrochemical gradient, so it does need energy to happen. Molecules move from the lower concentration side to the higher concentration side of the membrane. Carrier proteins are in charge of active transport. The needed energy might proceed from the ATP molecules or the membrane's electric potential. An example of molecules moved by active transport are the Na and K.

7 0
2 years ago
Karyotypes can be studied to determine an organism’s chromosomal makeup and to detect genetic defects. Down syndrome is a geneti
emmainna [20.7K]
The correct answer for the question that is being presented above is this one: "B. extra chromosome 21." Karyotypes can be studied to determine an organism’s chromosomal makeup and to detect genetic defects. Down syndrome is a genetic disorder that is also called trisomy 21. Trisomy 21 look like in a karyotype with <span>extra chromosome 21</span>
3 0
3 years ago
Read 2 more answers
Earning Task 1 rections: Observe a landscape garden in your nearby area. In three to five sentences, give your ideas based on yo
9966 [12]

Answer:

When designing a residential landscape, the most important step is to put a plan on paper. Developing a master plan will save you time and money and is more likely to result in a successful design. A master plan is developed through the 'design process': a step-by-step method that considers the environmental conditions, your desires, and the elements and principles of design. The goal is to organize the natural and man-made features in your yard into an aesthetic, functional, and environmentally sustainable landscape.

THE DESIGN PROCESS

The five steps of the design process include: 1) conducting a site inventory and analysis, 2) determining your needs, 3) creating functional diagrams, 4) developing conceptual design plans, and 5) drawing a final design plan. The first three steps establish the aesthetic, functional, and horticultural requirements for the design. The last two steps then apply those requirements to the creation of the final landscape plan.

The process begins with a site inventory and analysis of soil, drainage, climate conditions, and existing vegetation. This is a critical step for both plant selection and placement and locating family activities and functions. It's important because the same climate conditions that affect the plants—temperature, humidity, rain, wind, and sunlight—also affect you, the user. The next step is to make a list of your needs and desires—this helps you determine how your yard and landscape will be used. The site and user analyses will also help you establish a theme for the form and style of your design. The functional diagram is then used to locate the activity spaces on the site and from this diagram a conceptual plan is developed. The last step is a final design that includes all the hardscape and planting details that are necessary for installation. Throughout the design process there are ten important things to consider:

Understand your site for plant selection and activity location

Remember the user by considering what you want and need

Use a form and/or style theme to help determine shapes and organize spaces

Create and link spaces by designating activity areas and linking with elements

Consider the function of plants for both the environment and the user

Structure the plantings by using massing and layering techniques

Highlight important points such as transition areas and focal points

Pay attention to detail in the materials, the colors, and the surface textures

Take time into account for the growth and maintenance of plants

Protect your resources by using sustainable design practices

UNDERSTAND YOUR SITE

A thorough inventory and analysis of the site is important to determine the environmental conditions for plant growth and the best use of the site. Issues of concern include the soil type, topography, and regional climate. The type of soil determines the nutrients and moisture available to the plants. It is always best to use plants that will thrive in the existing soil. Although soil can be amended, amendment is often costly and most times ineffective. Existing vegetation can provide clues to the soil type. Where plants grow well, note the soil conditions and use plants with similar growing requirements. Pay particular attention to areas where plants are not doing well and adjust when choosing new plants. Topography and drainage should also be noted and all drainage problems corrected in the proposed design. A good design will move water away from the house and re-route it to other areas of the yard.

Climate concerns begin with temperature: plants must be able to survive the average high and, most importantly, the average low temperatures for the region. Use the USDA Plant Hardiness Zone Map (www.usna.usda.gov/Hardzone/) as a starting point to choose plants appropriate for your zone, but remember microclimates within your yard can offer alternatives. Sun/shade patterns, the amount and length of exposure to sun or shade (Figure 1), create microclimates (sometimes called microhabitats). Recording site conditions and existing vegetation on a base map will reveal the location of microclimates in the yard. Plants usually fall into one or two of four microclimate categories-full sun, partial shade, shade, and deep shade. It is important to remember that sun/shade patterns change with the seasons and over time as trees get larger.

Explanation:

5 0
2 years ago
a purple flower with an unknown genotype is crossed with a white flower .Determine the genotype of the purple if purple (P) is d
suter [353]
   (Pp is the purple flower with the unknown genotype, pp is the white flower)

First scenario:
                                               Pp x pp 
       first generation:         Pp   Pp  pp  pp   (two purple, two white flowers)

Second scenario:              
                                               PP x pp
    second generation :     Pp  Pp  Pp  Pp  (four purple flowers)
3 0
3 years ago
An important technique that helps provide insight into interesting genetic questions at the molecular level, such as reasons for
malfutka [58]

Answer:

DNA sequencing

Explanation:

DNA sequencing is a technique which helps in determining the DNA sequence of any organism. In the human genome project, all the bases that make DNA in humans are sequenced which helped doctors to determine the cause of many genetic diseases and also their treatment.

Hairlessness in dogs can be genetic and the mutated gene can be determined by sequencing the DNA of hairless dog and comparing it with the normal DNA sequence of dog. Therefore the correct answer is DNA sequencing.  

8 0
3 years ago
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