Answer: Microorganism activity affects soil acidity and the amount of organic matter in soil. It also affects the nutrient and mineral levels in soil as well as soil structure.
Explanation:
Answer:
A. Molecular changes such as extracellular signals on extracellular ligands can result in quick changes in cell behaviour. One example is insulin. Upon insulin binding on the receptor on the cell membrane, the cell release GLUT4 transporters (for muscle cells) to increase uptake of glucose.
B. Slow changes in cell behaviour can be observed for other lipophilic hormones or intracellular receptors such as glucocoortoid or estrogen which reacts with receptors in the cells.
C. Insulin is required to maintain a constant blood glucose level and hence levels of insulin has to be mediated in correspondence to the blood glucose levels. Fast acting signalling is thus required for homeostasis of blood glucose levels. Where for such lipophilic hormones such as steriods, glucocortoid, these hormones tend to have a longer lasting effect and hence results in a slow change.
Answer:a. The normal gene function is required for the viability of the zebrafish.
Explanation:
It is mentioned that if the gene responsible for forming stripes on its body is inactivated by mutation then fish without stripes will produced.
This will lead to the absence of phenotypic character that is strips on the fish. The other genes which are responsible for the survival of the fish will function normally thus this will be untrue that normal functioning of the gene required for expressing horizontal strips is also necessary for the survival and viability of the zebrafish.
Answer:
Extension
Explanation:
Extension refers to a physical position that increases the angle between the bones of the limb at a joint. It is a posterior movement for joints that move backward or forward such as the neck and it happens when muscles contract and bones move the joint from a bent position to a straight position.
Extension of the a joint is limited to 180 degrees. if it goes beyond that, it becomes hyperextension.
Hyperextension is an extreme version of extension. it is an excessive joint movement in which the angle formed by the bones of a particular joint is straightened beyond its normal range of motion. this type of movement is unhealthy and may increase chances of dislocation.
