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.
<span>(of hearing loss) caused by a lesion or disease of the inner ear or the auditory nerve.</span>
The Process in which pesticides are stored in body tissues is known as Bio-Accumulation.
When pesticides get into our body through eating food which is not go through the process of metabolism or which is not excreted, that is stored in fatty tissues of the body and as time passes we may build up high concentration of pesticides in our body. Pesticides are the chemical compounds used for killing pests, bacteria etc.
Answer:
chloroplast absorbs the energy in sunlight and uses it to produce sugars. chloroplasts are not needed in plant roots because their function is to use energy from the sun and to convert into starches to be used by the plant. Since sunlight doesn't reach the roots, it would be impossible to use chloroplasts anyways.
Explanation:
Answer:
(c)-All results for the experimental groups involving wing surgery would be invalid.
Explanation:
The study researcher shown in the above question noted that flies that underwent wing surgery were more attacked than those that received no wing treatment. However, the researcher does not show the study variables and, consequently, does not show any relationship between the variables and the research result. For this reason, we can state that based on this result, all results for experimental groups involving wing surgery would be invalid.
