Answer: Option D.
Explanation:
Active transport is defined as the movement of solutes or molecules across a membrane on the basis of difference in solute concentration.
Active transport functions continuously due to diffusion that allows solutes to move constantly across the membrane. Cells have low concentrations of sodium (Na+) and high concentrations of potassium (K+). Hence, the electrical gradient and concentration gradient of sodium (Na+) that allows diffusion of the ion into the cell, and the electrical gradient of Na+ (a positive ion) that allows movement of ion inward to the negatively charged interior.
Hence, the correct option is D.
Size is the number of animals total = 16.
Density is the number of animals per square kilometer.
16 divided by 1 square kilometer = 16 giraffes per square kilometer.
The districbution would be clumped, I think, cuz they are clumped together in small groups.
Answer:
The correct answer will be- the color change will be observed and the solution will turn purplish-black.
Explanation:
Iodine test is performed to test the presence of the carbohydrates mainly starch.
The iodine solution is chemically called potassium iodide which forms a yellow solution. The potassium iodide solution forms a complex with a starch solution which appears a purplish-black color which shows the presence of the carbohydrates.
In the given question, if we add the iodine solution to the beaker after a certain point of time then it will still form a complex with the starch and thus beaker solution will appear darker in color.
The nitrogen fixation is a very important process because it is the principal source of nitrogen in the marine environment for photosynthetic plants. Nitrogen is a growth limiting nutrient, that is very important for the growth of photosynthetic plants. During the process of nitrogen fixation, nitrogen is absorbed from the atmosphere and it is fixed by nitrogen fixing organisms.
