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siniylev [52]
3 years ago
15

What is the difference between pure breeding and true breeding

Biology
1 answer:
romanna [79]3 years ago
6 0
Purebreed is where both parents are the same breed to produce an offspring of the same breed.
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What is the sequence of defense for fighting off pathogens
LenKa [72]
When a pathogen comes in contact with your body, it has to breach the first line of defense to get inside. Your skin and mucus membranes are the main barrier here. Mucus traps the pathogens, and then is forced out of your body when you cough or blow your nose. Your skin also secretes chemicals that have antiviral properties, killing viruses on contact. If the pathogens get through that defense, the next line is non-specific immunity cells that patrol your tissues engulfing pathogens. There are other cells that do this, like macrophages, but the dendritic cells are most important for activating the third line of defense in your body.

Dendritic cells reside in your tissues, waiting for an invader to arrive. When they do find one, they engulf it and digest it. After they do this, they select pieces of the invader called antigens and put them on their surfaces. The dendritic cells migrate back to lymph nodes, key locations in your body filled with immune cells. There, they show the antigens, called antigen presentation, to two types of lymphocytes, T-cells and B-cells, activating them for a full immune response.
8 0
3 years ago
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Which disease-causing microorganism is responsible for the largest number of cases of foodborne illness in the united states? wh
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Norovirus is the most common and leading cause of food borne illness.
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3 years ago
In normal blood counts, the most abundant cells in the blood are
eimsori [14]
Neutrophils which are Leukocytes
4 0
3 years ago
Where are plankton-eating fish most likely to live in a freshwater lake?
Basile [38]
I think B. I hope this helps.
3 0
3 years ago
Hi everyone
professor190 [17]

Amino acids are acids on one hand, and a base on the other hand.

<h3>What is an acid?</h3>

An acid is a substance that produces hydrogen or hydroxonium ions as the only positively charged ion when it ionizes.

All amino acids have an amine group -NH_2 and a carboxylic group -COOH.

The carboxylic group ionizes such that:

COOH -- > COO^- + H^+

The presence of the amine group enables amino acids to also act as a base.

More on amino acids can be found here: brainly.com/question/14583479

#SPJ1

8 0
2 years ago
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