<h2>Answer:</h2>
The correct arrangement of steps that occur in producing neuron cells.
The steps are from 1 to 4 according to arrangement.
- Genes that lead to the production of undifferentiated precursor neurons are activated.
- Stem cell arise from the inner mass of cells.
- Signalling factors trigger differentiation in stem cells.
- Signalling factors causes precursor neurons to produce neurons.
Aerobic respiration<span>, a process that uses oxygen, and </span>anaerobic respiration, a process thatdoesn't<span> use oxygen, are two forms of cellular respiration. Although some cells may engage in just one type of respiration, most cells use both types, depending on an organism's needs. Cellular respiration also occurs outside of macro-organisms, as chemical processes — for example, in fermentation. In general, respiration is used to eliminate waste products and generate energy.</span>
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.
Answer:
The first option that is marked is correct.
Explanation:
Ionic bond is much stronger than the hydrogen bonding thus
it would require a large amount of energy to separate them for replication or transcription.