Cell walls are supporting structures that help the plant to have a fixed shape and protect it from injury. Other than that, it helps to keep the plant turgid so that it can stay firm and upright. Because when it enters a high water potential solution, as water moves in, the water exerts turgor pressure on the cell wall and the cell wall thus exerts an opposing pressure to keep water out. Hence cell wall is needed for the plant.
On the other hand, animal cells do not need to keep the structures, as they have the skeletal system to protect the organs and cushion them against any
external injuries.
I hope that helped
Answer:
C) Clone the plant
Explanation:
Cloning is the process by which genetically identical offsprings are obtained naturally or artificially. In nature, genetically similar individuals or offsprings are obtained from asexual reproduction.
If a horticulturist succeeds in having a single plant with the desired trait than to establish a line of such plant she should clone the plant so that the plants which are obtained after cloning have the same traits which were present in the parent plant. Therefore the correct answer is C.
Answer:
The influenza H1N1 virus is transmitted through saliva droplets and mucus from sick people, who by sneezing or coughing without covering their mouth and nose adequately, leave the virus in the air or on their hands, infecting then the objects they touch. As a rare occurrence, a person can become infected with the flu by touching a surface or object contaminated with the influenza virus and then touching the mouth, nose, or eyes.
Pigs sometimes transmit influenza H1N1 virus to people, primarily pig farmers and veterinarians.
Answer:
No, it isn't
Explanation:
An invasive species is characterized by an organism's appearance in an area it is not a native of, with a high capacity of reproduction that will cause it to be a threat to native species in that area. A species of organism is tagged "invasive" if it is foreign to a region/location and possess a high reproductive rate that spreads fast and causes harm to other species.
Based on the analogy given in this question about the escape of a rattlesnake from a zoo, it cannot be ascertained that it is an example of invasive species. This is because rattlesnakes may be native to that area and possess a zero threat level to the environment in terms of high spreading rate.
Mature human sperm and ova are
similar in that they both have the same number of chromosomes. The human sperm
and ova are the reproductive cell in male and female respectively. The sperm
cells are motile while the ova are not. A mature human sperm and ova both contain 23
pairs of chromosomes.
