In an evolutionary sense, birds are a living group of dinosaurs because they descended from the common ancestor of all dinosaurs. Other than birds, however, there is no scientific evidence that any dinosaurs, such as Tyrannosaurus, Velociraptor, Apatosaurus, Stegosaurus, or Triceratops, are still alive.
When a fish swims from salt water into fresh water its cells react by losing water and shrinking. The correct option is D.
<h3>What is fresh water?</h3>
Glaciers, lakes, reservoirs, ponds, rivers, streams, wetlands, and even groundwater contain fresh water.
These freshwater habitats cover less than 1% of the world's total surface area but are home to 10% of all known animals and up to 40% of all known fish species.
When a fish swims from salt water into fresh water its cells react by losing water and shrinking due to osmosis.
Thus, the correct option is D.
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Answer:
the spring time is when they call for mates
A. the kelvin temperature scale
Professional antigen-presenting cells, such as phagocytes, are the first cells to encounter a pathogen (apcs). This means they have the ability to activate cells of the adaptive immune system.
<h3>What is meant by Pathogen?</h3>
- A pathogen is an organism that infects its host with disease, and the severity of the disease symptoms is referred to as virulence.
- Pathogens include viruses, bacteria, unicellular and multicellular eukaryotes, and a wide range of other organisms.
- The bone marrow of an average healthy adult generates 100 billion new neutrophils per day. Because there are so many neutrophils in the body at any given time, they are often the first cells to reach the site of an infection.
- Long thought to be a component of the innate immune system, complement has recently emerged as an important regulator of the adaptive immune response.
Therefore the correct option is D) can activate cells of the adaptive immune system.
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