Answer:
C. Ringed seal
Explanation:
A marine food web illustrates how energy is passed from one organism (level) to another in this aquatic rich ecosystem.
In the following food web, the interaction goes like this:
- The Arctic cod feeds on plankton and silverslides and it is preyed upon beluga whales and ringed seals.
- The sea duck goes to the bottom of the ocean to feed on benthic organisms and also consumes plankton and silverslides. It doesn't really have predators.
- The beluga whale doesn't really have predators, but it feeds on fish such as silverslades and Arctic cod.
- Ringed seals feed on plankton and Arctic cod and are then consumed by polar bears.
Therefore, according to this information, all organisms except the ringed seal feed directly on silverslides.
Immediately, the pathogen has been recognized:
Macrophages acts as the first line of defence by engulfing pathogens identified by antigens which will now present the antibody shape to a helper T cell.
The Helper T cells produce a signal to plasma and Memory B cells to yield antibodies that attach to the antigens. The cytotoxic cells that leads to cell death are activated by the helper T cells.
Antibodies helps to immobilize pathogen for macrophage to feed on.
if the pathogen comes back a 2nd time the memory cells helps in quick and efficient recovery by producing the specific B and T cells for the antigen.
Answer:
Microscopes
Explanation:
cells were seen on the microscope.
