Dr. marshall demonstrated that gastric ulcers are caused by a bacterium by using Koch’s postulates.
Koch’s postulates are four standards created to confirm a causative relationship between a microorganism and a disease. Koch’s postulates were formulated in 1884 by Robert Koch and Friedrich Loeffler. Koch’s postulates include;
- the microorganism must be found in every cases of the disease.
- the microorganism must be isolated from the diseased host and grown in pure culture
.
- the cultured microorganism must cause the disease when introduced into a healthy laboratory animal
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- the microorganism must be re-isolated from the new host and identified to be the same as the original causative agent
.
Answer:
The answer is A. TRUE
Explanation:
Diapedesis can be described as the movement of the blood cells in the intact walls of the blood capillaries. Diapdesis refers to the event through which passage for the blood cells is created to move towards the tissues.
The mechanism of diapedesis occurs frequently and can be observed when leukocytes move towards the site of inflammation or any injury. Diapedesis also occurs when lymphocytes are recirculated from the blood to the lymphatic system.
Answer:
The law of segregation states that the two alleles of a single trait will separate randomly, meaning that there is a 50% either allele will end up in either gamete. ... The law of independent assortment states that the allele of one gene separates independently of an allele of another gene. pls make me branilist
Answer:
The diagram is used by biologists to determine the probability of an offspring having a particular genotype. The Punnett square is a tabular summary of possible combinations of maternal alleles with paternal alleles. The Punnett square is a visual representation of Mendelian inheritance.
Explanation:
An example of a Punnett square:
tt and TT
t . t
T tT . tT
T tT tT
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Answer:
The Red blood cell swells and burst because the IV fluid is Hypotonic (contains more water or solvent ) to the red blood cell, the red blood cell is consequently hypertonic (it contains more solute ) to the IV fluid In other to maintain balance, the red blood cell to absorbed more water from the IV fluid via the process of osmosis this eventually led to swelling and bursting of the red blood cell. This process is is known as hemolysis