I would say all of the above
Is that an option?
Many compounds are used for the benefit of human health/lifestyle, such as silk from silkworms, wool from sheep and so on. Even medicines and drugs are obtained from plants.
Answer:
This is because a single species of potato plant was predominantly cultivated at a time by farmers on the same farmland year in-year out in ireland in the 1800.This is monoculture.
One of the disadvantages of this practice is lack of genetic variation, which reduces the resistance of these plant to potato blight.
Lack of genetic diversity made the same gene to be inherited by all the potatoes and therefore no room for a resistant gene which might have provided resistance gene, through variation thus all the potatoes with the same weak resistant genes were exposed to the same<em> phytophtora infestant</em> which caused rotten .
This is an example of genetic diversity and its importance in diseases protection.
The stage is implantation. it embeds into uterus wall. it happened after fertilisation
Answer:
Explanation: the environment is always changing meaning plants are always adapting.