Answer:
Both facilitated diffusion and active transport are selective processes. Only selective molecules are allowed to cross the membrane. They utilize carrier proteins to move across the membrane.
Explanation:
Diffusion is the process by which molecules move across a membrane respective of the concentration gradient. The plasma membrane is a <em>selectively permeable membrane</em> which allows specific molecules to move across the concentration gradient.
Molecules migrate from a region of higher concentration to a lower concentration in case of diffusion. It can be classified into simple diffusion and facilitated diffusion. These are examples of <em>passive transport</em>.
In facilitated diffusion molecules move across the concentration gradient with the help of <em>carrier proteins or channel proteins</em>. The carrier proteins bind to the molecule which has to be transported and change conformation to allow it to cross the membrane. For example glucose molecule is carried across through <em>GLUT transporter</em>. <em>Channel proteins</em> open a channel inside the membrane and molecules get transported across the gradient.
Active transport carries molecules against the concentration gradient with the assist of energy. ATP hydrolysis is utilized to generate energy. As a result of active transport, the molecules are aggregated on one side of the membrane.
<h2>Answer is "True" Generate a new hypothesis</h2>
Explanation:
- Due to the false hypothesis a student create a new hypothesis for the research.the hypothesis gives the objective to the research and the methodology to complete the work.
- If the student doesn't generate the correct the methodology hence, its work is not proficient to the research that's why the student try to do new analysis with new ideas.
- This is because the hypothesis is a conditional explanation about the connection between at least two factors. It is a particular, testable expectation about what you hope to occur in an investigation. For instance, an investigation intended to take a gander at the connection between lack of sleep and test execution may have a hypothesis that expresses, "This examination is intended to evaluate the theory that restless individuals will perform more awful on a test than people who are not sleepless.
- So, the right answer is true "Generate a new hypothesis" is the next step.
Answer:
The involvement of more than two genes.
Explanation:
The polygenic characteristics have many phenotypes because more than two genes governs the phenotype of individual organism. The single gene contains a pair of alleles that codes for two phenotype and two genes will code for 4 phenotype. Thus, more than two genes for example, three genes will have six phenotypes.
The skin color and height are polygenic characterstics in humans.
Answer:
C
Explanation:
Small objects usually do not permeate the surface of the water due to its high tension. The covalent bonding of water allows for its unique ability of high surface tension.
The correct answer is "<span>Wrap the thumb in gauze, place in a bag and then on ice".
Wrapping the cut-off finger in gauze or in any cloth, should be immediately placed in a bag then put on ice for it to be chilled. the thumb should not be exposed directly to the ice, or it will cause ice burns, wherein it will cause the thumb to not get sewn back. the ice is used to chill the thumb, to prevent the it from decomposing, not for freezing it. </span>
