Answer:
Option B,
Explanation:
Proper restraint and handling techniques are used while dealing with animals in laboratory. These techniques ease the process of dealing with animals and must be practiced on regular basis even when there is no procedure being performed.
Unlike other animals cat is the most co-operative animals and it is usually dealt by restraining the body be one hand and head by other hand. Cats can also be restrained by holding the scruff with one hand and then gently holding the hind limbs followed by stretching it.
Hence, option B is correct.
The correct answer is the cell.
Answer:
Natural selection
Explanation:
Natural selection is a process where some organisms are able to reproduce more and survive better due to the presence of beneficial genetic traits in them. The other organisms of the same population that lack these traits are not able to survive and reproduce in the same way. The bacterial having drug resistance are able to survive in the presence of drugs in the surroundings. These bacteria will reproduce more and leave more progeny. Over the generations, the proportion of the bacteria with drug resistance will increase. This represents an example of natural selection.
Answer:
If leaf color change is related to temperature, then exposing plants to low temperatures will result in changes in leaf color:
Independent: <u>temperature</u>.
Dependent: <u>leaf color</u>.
Other variable(s): According to the information, <u>there are no other variables</u>.
Explanation:
When formulating a hypothesis, it is inevitable that the presence of variables on which the hypothesis is formed is established. The hypothesis raised is the <u>effect of temperature on the color change of the leaf of a plant</u>.
The<em> independent variable</em>, used in research work, is an element that does not depend on other variables but can influence the behavior of the dependent variable. In this case, the independent variable is the temperature. In addition, the independent variable can be managed to observe its effect on other variables.
An <em>dependent variable</em> is a characteristic that is influenced or modified by the presence of other variables, such as the independent variable of a study. In this case is the color of the leaf of a plant.
Answer: The correct answer is option E.
Explanation:
Digestions refers to the breaking down of food (larger molecules) into smaller absorb-able units.
Chemical digestion refers to digestion of food with the help of chemicals such enzymes, acid, and bile.
Enzymes are the main type of chemicals which hydrolysis (breaking down of compound with the help of water) the macro-molecules such as polysaccharides, polypeptides, et cetera into smaller and simpler units.
For example, amylase hydrolyse polysaccharides into smaller units such as maltose and glucose; trypsin, chymotrypsin, pepsin are enzymes which hydrolyze polypeptides into amino acids, nucleases are the enzymes which help in hydrolysis of nucleic acids, et cetera.
Bile and lipases help in emulsification of fats.
Thus, the correct answer is option E.
