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solniwko [45]
3 years ago
14

How do symbiotic bacteria act as a barrier to pathogenic bacteria

Biology
1 answer:
lyudmila [28]3 years ago
7 0
Symbiotic bacteria have already established their colonies in the host hence prevent the invasion of other bacteria through competition. They act as a barrier to keep nastier pathogens at bay. These bacteria are also important in mucosal immunology of humans by influencing on the development and function of both innate and adaptive branches of the immune system.
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Some people have one sickle cell gene and one normal gene. They have few defective cells and no symptoms because the sickle cell
VladimirAG [237]

Answer:

Explanation:During fertilization the embryo receives half of its genetic information from both parents. If one parent is a carrier or sickle cell their genes would be Aa little a being the recessive gene. When mixed with the other parents gene who does not have sickle cell their genes would be AA. When you make a pun net square the results would be AA,AA,Aa,and Aa. Therefore the offspring would have a 50% chance of being a carrier of sickle cell but not having the actual disease

7 0
4 years ago
Identify the remaining processes and components of the carbon cycle
Free_Kalibri [48]

The correct processes and components of the carbon cycle is given in the image attached .

5 0
4 years ago
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Who did julius caesar help take back Egypt?
Phantasy [73]
He helped Cleopatra take back Egypt


4 0
4 years ago
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Choose the functions of amino acids (free or in a bound form):A. carriers of genetic information B. neurotransmitters C. enzyme
Citrus2011 [14]

Answer: B. Neurotransmitters; C. Enzyme components; E. Hormones

Explanation: Aminoacids have a variety of functions because they can create proteins. These long and complex molecules perform important roles in different biological processes: they are responsible for the formation of enzymes and hormones. In neurotransmitters, the glutamate appears to be related to functions of the brain, like learning and memory. Other functions of the aminoacids are regeneration of muscular cells, have a role in imunology, growth of tissue, production of collagen and others.

7 0
4 years ago
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A while mates with a blavk hen. The offspring is gray color. What is this phenomenon called
Lynna [10]

Answer:

Incomplete Dominance

Explanation:

Incomplete dominance is a phenomenon in which the alleles of two genes are not completely dominant over each other and so when they are present at the same time in an organism (heterozygous for that gene) the organism will have an intermediate phenotype that is a combination of both phenotypes.

For example: The flower color in Snapdragon can have three different genotypes as well as phenotypes. The flowers can be red, pink or white depending on their genotype. The allele for red flower (R) is incompletely dominant over allele of white flower (r). A plant with genotype RR will be red flowered and that with rr will be white flowered. However, if a plant has genotype Rr (intermediate), then the flowers will be white in which no allele was dominant over the other and both showed their effect giving a combination of two colors as Pink flowers.

Same is the case with the mating between white and black hen, where offspring was grey in color. This grey was a combination phenotype of two phenotypes.

Hope it helps!

7 0
4 years ago
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