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MrRissso [65]
3 years ago
15

An infection begins when a pathogen or parasite begins to cause symptoms of a disease.

Biology
1 answer:
MAVERICK [17]3 years ago
5 0
Is this a true or false question?
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Which of the following statements best describes the likely effect of the channel on the process carried out by tryptophan synth
LUCKY_DIMON [66]

Answer:

The tryptophan synthase enzyme catalyzes the synthesis of tryptophan. This enzyme is found in all kingdoms except animals.

Tryptophan synthase has a hydrophobic channel that facilitates the passage of an intermediate from one enzyme to the other during the biosynthesis of tryptophan, which makes faster the metabolic process.

4 0
3 years ago
Organisms that produce
enot [183]

Answer:

Autotroph or producers

Explanation:

An organism that produces its own food is a autotroph

4 0
2 years ago
A 14-year-old boy has been diagnosed with infectious mononucleosis. Which of the following pathophysiologic phenomenon is most r
Sunny_sXe [5.5K]

Answer:

B) Viruses are killing some of his B cells and becoming incorporated into the genomes of others.

Explanation:

Epstein-Barr virus causes infectious mononucleosis by following mechanism.

1) Epstein-Barr virus attaches to and infects epithelium of the throat where it replicates and causes pharyngitis.

2) Virions enter the lymphoid vessels and are carried to the lymph nodes. Some virions escape the lymphnode trap and are carried to the bloodstream.

3) Virions attach specifically to B lymphocytes and infect them, producing either latent infection or productive infection.

4)The infected B lymphocytes actively replicate and differentiate into cells producing random immunoglobulins.

5)T cells respond to infection and destroy the lymphocytes replicating EBV vitus.

6) Latently infected B lymphocytes become immortal. They are not attacked by T cells.

8 0
3 years ago
Why do environmental scientists use systems and diagrams to explain process in ecosystems
pav-90 [236]
So u kan get a better understandin on wta dere talkin bout plus its just daeasiesway to get it across
6 0
3 years ago
What are some negative impacts of having this life cycle that might have contributed to a decline in the dragonfly population?
KonstantinChe [14]

Answer:

Dragonflies are important for our environment.

Explanation:

Dragon flies belongs to the ancient family of insects. They are found on every parts of the world and have been from around 300 millions years ago. There are more than 5000 different species of them found in different parts of the world. Conserving dragonflies is important as they considered as a valuable environmental indicators.

Dragon flies are found in the areas where water is available and near grasslands. Their life cycle is an example of an incomplete metamorphosis. The dragon flies lays their eggs near the water or in the water. Dragon flies spends most of the life time as a nymph in the water where they turn into an adult and leave the water. The dragon flies rely on the aquatic ecosystems all through their life. Thus dragonflies are an important indicators of the environment and water quality.

Most of the life cycle of the dragon flies depend on the availability of water and its quality. Polluting water and destroying their habitat will result in the decline of the population of the dragon flies.

5 0
2 years ago
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