Answer:
3. Polysaccharide carbohydrate
EXPLANATION:
The POLYSACCHARIDE capsule of Streptococcus Pneumoniae is the major virulence factor in it's invasion and subsequent infection.
The capsule helps to avoid phagocytosis which is a defence mechanism by the body.
The polysaccharide capsule also gives the bacterial organism several serotypes.
The pneumococcal vaccine is derived from the organism's capsule.
The number of neutrons
and the mass number
Answer:
According to bottom-up and top-down control models of community organization, which of the following expressions would imply that an increase in the size of a carnivore (C) population would negatively impact on its prey (P) population, but not vice versa? D) P ← C
Explanation:
A community is defined by all the organisms living in the same area. In nature, theses communities are organized in a bottom-up or a top-down model. Bottom-up control is importante because of the association between many species and the supply of resources from the environment. The sources of top-down control is made of consumers and predators.
B increasing greenhouse gas
