Answer:
Because they don't have fertilizer.
Explanation:
Well, if this was a long time ago, then farmers did not have fertilizer. So, there are bacteria on the roots of plants that convert nitrogen into a usable form. It's very important for growing, and when farmers harvest the crop, not much of the nitrogen is returned to the land, so it is not as fertile. Fertilizer is largely consisted of nitrogen, so that is why farmers use fertilizers today. But "a long time ago," farmers did not have fertilizer.
Stimulus is the light on a insect and moves towards the light . If the insect doesn’t respond to the bright light then you know that the light is not a stimulant figure for the insects to respond to
Answer:
A duck's foot is webbed and the chicken's foot is not
Explanation:
The difference is due to apoptosis.Ducks have webbed feet because the cells between their toes do not undergo apoptosis
Archaeopteryx had "teeth, three claws on each wing" similar to dinosaurs. So, most appropriate answer would be Teeth & Wings
Hope this helps!
