It’s B plants are supported by the pressure of water inside the cells pressing outwards on the cell wall
A virus is a microscopic particle that can infect the cells of a biological organism. Viruses can only replicate themselves by infecting a host cell and therefore cannot reproduce on their own. It has been argued extensively whether viruses are living organisms.
They don't reproduce, as far as I know. They are produced in bone marrow.
Answer:
Estimated size is 1600
Explanation:
Given data:
Size of lake is 250 hectares
Total number of trout who netted is 400
Total number of trout in next week is 200
Total number of trout having fin clip 50
estimation population size is estimated by mark rupture as follow
Estimated population size 
Estimated size
Estimated size is 1600