This scientist established a set of criteria to determine if a microbe is the cause of a specific disease.

1 answer:

5 0

Robert Koch developed a criteria for the causality of disease from microorganisms called the Koch's postulates. The Koch's postulates indicate that:

(1) The bacteria must be present in every case of the disease
(2) The bacteria must be extracted and isolated from the host with the disease and should be directly visualized and/or grown in culture
(3) There must be a healthy experimental host that will reproduce the disease once the isolated bacteria is injected
(4) The bacteria should be recoverable from the previously healthy host

You might be interested in

If the pinsulin receptor, a, example of an integral membrane protein, is cotranslationally inserted into the ER membrane with th

kicyunya [14]

Answer:

The correct answer is option C.

Explanation:

As the proteins are produced in the endoplasmic reticulum membrane, they amalgamate with the vesicles and then they are conducted towards the membrane's cell surface where they act as an integral membrane protein.

The outer end will bind with the ligand and the other one will get attached towards the cytoplasm. Thus, the pinsulin in the given case will combine with the C terminus of the protein.

3 0

3 years ago

What is the main difference between a food chain and a food web

nexus9112 [7]

Its definitely not A, nor is it D because food webs and food chains can be either land or aquatic animals. i think its B because a food chain goes up and a food web includes more organisms

3 0

3 years ago

State two ways in which endocrine glands and exocrine glands differ.

denis-greek [22]

Answer:

The two major differences lies in the function and support system.

Explanation:

The two major differences between an endocrine and an exocrine system are as follows –

a) An endocrine system releases its produce (hormones) into the connective tissue i.e blood while the exocrine system releases hormones directly into the ducts so that it could reach the targeted tissue directly.

For example – the Adrenal gland is an endocrine gland that secretes adrenaline directly into the blood. The salivary gland is an exocrine gland that releases its produce into the collecting duct leading to mouth. However, Pancreas is both endocrine and exocrine gland.

b) The endocrine system cannot work alone therefore it works in coordination with the nervous system to control actions and balance the body. However, the exocrine system works independently

5 0

3 years ago

Which best explains why a pyramid is used to represent energy flow within an

Nat2105 [25]

Answer:

The answer is A

Explanation:

Because available energy decreases as you go up

5 0

3 years ago

Read 2 more answers

How have scientist started to study relationships between different groups of organisms?

Delicious77 [7]

<h2>Answer:</h2>

The scientist started to study relationships among various groups of organisms <u>C. by using genetic analyses</u>.

<h2>Explanation:</h2>

The following features were used to study about the relationships between different groups of organism:

External morphology
Similarities in structure
Genetic analysis
Chemical composition

The molecular similarities in the structure of RNA, DNA, and proteins help to establish the relationship of relationships between different groups of organisms. This was studied through testing the samples obtained by organisms using genetic analyses.

7 0

3 years ago