Answer:
Option-A
Explanation:
In the given question, the person predicts that if CO₂ level in the atmosphere will be increased then the phytoplanktons will grow more and the atmospheric carbon will be absorbed and will be fixed.
This statement juts seem like assumptions and if we consider this as a hypothesis then the facts will not be in favour of this hypothesis.
In the present day, the CO₂ level has already increased but the plants are not been able to utilise the Carbon dioxide and reduce global warming as the carbon uses free carbon from the atmosphere only and not bound carbon.
Thus, Option-A is correct.
True. Since electron microscopes use electrons instead of light, it can magnify up to 500,000 times of it’s actual size.
Answer:
The correct answer is option - C. low power objective.
Explanation:
In microscopes, low power objectives have a wide field of view and use to study the many smaller specimens or large specimens. 10X is the power of the low objective.
To study the depth of the field the lower objective rotated and aligned on the place over the specimen. When you move to high power objective the field of view gets close in and only can study the smaller specimen or small section of a large specimen.
Thus, the correct answer is option - C. low power objectives.
Answer:
option d, b, c
Explanation:
Starch molecules taken into the mouth from food substances are processed to an extent of 30% of its digestion. this is carried out by a specialized protein/ an enzyme that is present in the saliva; called amylase or ptyalin. this enzyme acts on the substrate molecule which in this case is starch molecules and convert it into smaller chains of simple sugars that includes maltose and dextrin which is digested in the small intestine.
