Answer:
(D) Increased susceptibility to plant disease- if corn is more susceptible to plant diseases, then it will be at a risk of extinction.
Explanation:
Genetic variation helps a population to develop despite varying environmental conditions as to decrease the risk of extinction. Genetic diversity is used to create improved crop varieties with traits such as yield, pest resistance and environment stress. Lack of genetic diversity in corn will make it susceptible to plant diseases and be at risk of extinction.
Two statements support the claim that Jenner has been given credit for starting and spreading the practice of immunization:
- Jenner became interested in the protective effects of cowpox during his apprenticeship. Here, we are told that Edward Jenner started working on ways to defend the body against diseases as early as during his apprenticeship when he was a teenager. He had been told that farm workers who had contracted cowpox were immune to the smallpox epidemic which was spreading across Europe at the time. He then started working on a vaccine containing cowpox.
- Jenner made the first step to erase smallpox. This first step was to try his new smallpox vaccine on a child in 1796. The child did not catch smallpox. In order to get recognition and validation from the authorities, Jenner administered his vaccine to 22 more people, with success.
Answer:
Ghana is found in the Western region of Africa. Its geography is divided into four major zones.
The coastline which is sandy with plains and scrub with rivers and streams.
The high plains are found in the northern part of Ghana.
Ashanti uplands and plateau which are found in the South-west and south-central part of Ghana
The hilly Akwapim-Togo ranges are found along Ghana's eastern international border
Answer:
B. it is based on the idea that all the present continents were one supercontinent
Explanation:
This is the answer because Pangaea is the name of the supercontinent whose existence is theorized. This theory supports plate tectonics because if it wasn't for plate tectonics, all the continents would still be a single large landmass.
