~~6. what are five limiting factors that would control the population density of weeds

The following five limiting factors would control the population density of weeds;

1.       Supply and nutrients in the soil

2.       Presence/Absence of growth-restricting substances such as pesticides

3.       The soil aeration and soil structure

4.       Moisture content in the soil.

5.       Biotic factors such as disease and pests

6.       Quality, intensity and duration of light

Explanation:

Weeds are all species that are born without human assistance, sporadically appear in the soil, starting to compete for light, space and nutrients and undermine the development of planned cultivation. In addition, weeds tend to spread quickly and quantitatively, competing for space in their fields.

Before establishing an economically viable crop in an area, weed management needs to be done. They must be removed and management must be done so that they do not grow back. For this reason, it is important to know what are the factors that limit weed growth. These factors are:

both anaerobic and aerobic respiration use glucose (or other carbohydrates), proteins and lipids to produce atp and nadh. cell uses those energy molecules, obtained from food and   breaks them down during the chemical reactions of respiration. in anaerobic respiration, nadh is regenerated to nad+ by enzymes lactate dehydrogenase (lactate is produced, e.g. in muscle cells) or by alcohol dehydrogenase where ethanol is produced (alcohol fermentation), while in aerobic respiration, electrons from nadh are deposited in the mitochondria to regenerate nad+ (electron transport chain. anaerobic respiration produces 2 atp per molecule of glucose compared to aerobic respiration where about 38 atp molecules are produced.