EXERCISE
SUMMATIVE TASKS
1. Answer the following questions
How does plant grow from seed?
b) What is dispersal?
d. What are the agents of seed dispersal?
What is the role of cotyledont
e) What is vegetative propagation?
Dawalabelled diagrama the structed
Answers
Answer:
Coronaviruses are a group of related RNA viruses that cause diseases in mammals and birds. In humans, these viruses cause respiratory tract infections that can range from mild to lethal. Mild illnesses include some cases of the common cold (which is also caused by other viruses, predominantly rhinoviruses), while more lethal varieties can cause SARS, MERS, and COVID-19. Symptoms in other species vary: in chickens, they cause an upper respiratory tract disease, while in cows and pigs they cause diarrhea. There are as yet no vaccines or antiviral drugs to prevent or treat human coronavirus infections.
Orthocoronavirinae
Coronaviruses 004 lores.jpg
Transmission electron micrograph of avian infectious bronchitis virus
SARS-CoV-2 without background.png
Illustration of the morphology of coronaviruses; the club-shaped viral spike peplomers (red) create the look of a corona surrounding the virion when seen with an electron microscope.
Virus classificatione
(unranked):
Virus